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    <title>DEV Community: Joe Wu</title>
    <description>The latest articles on DEV Community by Joe Wu (@wujoe132).</description>
    <link>https://dev.to/wujoe132</link>
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      <title>DEV Community: Joe Wu</title>
      <link>https://dev.to/wujoe132</link>
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    <item>
      <title>A Reproducible Benchmark for Visual Consistency in AI Characters</title>
      <dc:creator>Joe Wu</dc:creator>
      <pubDate>Wed, 15 Jul 2026 01:39:28 +0000</pubDate>
      <link>https://dev.to/wujoe132/a-reproducible-benchmark-for-visual-consistency-in-ai-characters-3e7c</link>
      <guid>https://dev.to/wujoe132/a-reproducible-benchmark-for-visual-consistency-in-ai-characters-3e7c</guid>
      <description>&lt;p&gt;AI character systems often look convincing in a single image and inconsistent across a sequence. Hair length changes, clothing details disappear, apparent age drifts, or a video no longer resembles the portrait that introduced the character. The usual response is to keep rewriting prompts. That helps occasionally, but it does not explain which constraint failed or whether a model update improved the system.&lt;/p&gt;

&lt;p&gt;This article describes a small, reproducible benchmark for treating character appearance as a testable contract. It is based on evaluation patterns used by the Ponys.ai team, generalized so the method can be reused with any image or video pipeline.&lt;/p&gt;

&lt;h2&gt;
  
  
  1. Separate identity from scene
&lt;/h2&gt;

&lt;p&gt;A prompt becomes hard to debug when identity, camera, environment, action, and rendering style are mixed into one paragraph. Store them as separate fields:&lt;/p&gt;

&lt;div class="highlight js-code-highlight"&gt;
&lt;pre class="highlight yaml"&gt;&lt;code&gt;&lt;span class="na"&gt;character_id&lt;/span&gt;&lt;span class="pi"&gt;:&lt;/span&gt; &lt;span class="s"&gt;aurora-017&lt;/span&gt;
&lt;span class="na"&gt;identity&lt;/span&gt;&lt;span class="pi"&gt;:&lt;/span&gt;
  &lt;span class="na"&gt;apparent_age&lt;/span&gt;&lt;span class="pi"&gt;:&lt;/span&gt; &lt;span class="s"&gt;adult&lt;/span&gt;
  &lt;span class="na"&gt;face_shape&lt;/span&gt;&lt;span class="pi"&gt;:&lt;/span&gt; &lt;span class="s"&gt;oval&lt;/span&gt;
  &lt;span class="na"&gt;eye_color&lt;/span&gt;&lt;span class="pi"&gt;:&lt;/span&gt; &lt;span class="s"&gt;green&lt;/span&gt;
  &lt;span class="na"&gt;hair&lt;/span&gt;&lt;span class="pi"&gt;:&lt;/span&gt; &lt;span class="s"&gt;long black hair with straight fringe&lt;/span&gt;
  &lt;span class="na"&gt;stable_marks&lt;/span&gt;&lt;span class="pi"&gt;:&lt;/span&gt;
    &lt;span class="pi"&gt;-&lt;/span&gt; &lt;span class="s"&gt;small mole below left eye&lt;/span&gt;
&lt;span class="na"&gt;wardrobe&lt;/span&gt;&lt;span class="pi"&gt;:&lt;/span&gt;
  &lt;span class="na"&gt;primary&lt;/span&gt;&lt;span class="pi"&gt;:&lt;/span&gt; &lt;span class="s"&gt;navy field jacket&lt;/span&gt;
  &lt;span class="na"&gt;required_details&lt;/span&gt;&lt;span class="pi"&gt;:&lt;/span&gt;
    &lt;span class="pi"&gt;-&lt;/span&gt; &lt;span class="s"&gt;silver zipper&lt;/span&gt;
    &lt;span class="pi"&gt;-&lt;/span&gt; &lt;span class="s"&gt;two chest pockets&lt;/span&gt;
&lt;span class="na"&gt;scene&lt;/span&gt;&lt;span class="pi"&gt;:&lt;/span&gt;
  &lt;span class="na"&gt;location&lt;/span&gt;&lt;span class="pi"&gt;:&lt;/span&gt; &lt;span class="s"&gt;railway platform&lt;/span&gt;
  &lt;span class="na"&gt;time&lt;/span&gt;&lt;span class="pi"&gt;:&lt;/span&gt; &lt;span class="s"&gt;blue hour&lt;/span&gt;
&lt;span class="na"&gt;camera&lt;/span&gt;&lt;span class="pi"&gt;:&lt;/span&gt;
  &lt;span class="na"&gt;framing&lt;/span&gt;&lt;span class="pi"&gt;:&lt;/span&gt; &lt;span class="s"&gt;medium shot&lt;/span&gt;
  &lt;span class="na"&gt;lens_equivalent_mm&lt;/span&gt;&lt;span class="pi"&gt;:&lt;/span&gt; &lt;span class="m"&gt;50&lt;/span&gt;
&lt;span class="na"&gt;style&lt;/span&gt;&lt;span class="pi"&gt;:&lt;/span&gt;
  &lt;span class="na"&gt;rendering&lt;/span&gt;&lt;span class="pi"&gt;:&lt;/span&gt; &lt;span class="s"&gt;cinematic realism&lt;/span&gt;
  &lt;span class="na"&gt;color_rule&lt;/span&gt;&lt;span class="pi"&gt;:&lt;/span&gt; &lt;span class="s"&gt;cool ambient light, neutral skin&lt;/span&gt;
&lt;span class="na"&gt;negative_constraints&lt;/span&gt;&lt;span class="pi"&gt;:&lt;/span&gt;
  &lt;span class="pi"&gt;-&lt;/span&gt; &lt;span class="s"&gt;no logo&lt;/span&gt;
  &lt;span class="pi"&gt;-&lt;/span&gt; &lt;span class="s"&gt;no school uniform&lt;/span&gt;
  &lt;span class="pi"&gt;-&lt;/span&gt; &lt;span class="s"&gt;no childlike proportions&lt;/span&gt;
&lt;span class="s"&gt;~~~&lt;/span&gt;

&lt;span class="s"&gt;The `identity` block should change rarely. Scene and camera fields are allowed to vary. This separation makes it possible to determine whether a failure belongs to identity preservation, prompt composition, or rendering.&lt;/span&gt;

&lt;span class="s"&gt;A character can be defined in a structured [character creation flow](https://ponys.ai/create), while published examples can be sampled from a [character discovery surface](https://ponys.ai/discover) for the same evaluation set.&lt;/span&gt;

&lt;span class="c1"&gt;## 2. Build a minimum test matrix&lt;/span&gt;

&lt;span class="s"&gt;One attractive result is not evidence of consistency. For every character version, render at least the following matrix&lt;/span&gt;&lt;span class="err"&gt;:&lt;/span&gt;

&lt;span class="pi"&gt;|&lt;/span&gt; &lt;span class="err"&gt;Case&lt;/span&gt; &lt;span class="err"&gt;|&lt;/span&gt; &lt;span class="err"&gt;Variable&lt;/span&gt; &lt;span class="err"&gt;changed&lt;/span&gt; &lt;span class="err"&gt;|&lt;/span&gt; &lt;span class="err"&gt;Variables&lt;/span&gt; &lt;span class="err"&gt;held&lt;/span&gt; &lt;span class="err"&gt;constant&lt;/span&gt; &lt;span class="err"&gt;|&lt;/span&gt; &lt;span class="err"&gt;Purpose&lt;/span&gt; &lt;span class="err"&gt;|&lt;/span&gt;
&lt;span class="err"&gt;|&lt;/span&gt;&lt;span class="s"&gt;---|---|---|---|&lt;/span&gt;
&lt;span class="err"&gt;|&lt;/span&gt;&lt;span class="s"&gt; A1 | seed | identity, scene, camera | measure seed sensitivity |&lt;/span&gt;
&lt;span class="err"&gt;|&lt;/span&gt;&lt;span class="s"&gt; A2 | camera angle | identity, wardrobe, scene | detect face drift |&lt;/span&gt;
&lt;span class="err"&gt;|&lt;/span&gt;&lt;span class="s"&gt; A3 | expression | identity, camera | detect age and feature drift |&lt;/span&gt;
&lt;span class="err"&gt;|&lt;/span&gt;&lt;span class="s"&gt; A4 | lighting | identity, wardrobe | detect color instability |&lt;/span&gt;
&lt;span class="err"&gt;|&lt;/span&gt;&lt;span class="s"&gt; A5 | environment | identity, camera | detect prompt competition |&lt;/span&gt;
&lt;span class="err"&gt;|&lt;/span&gt;&lt;span class="s"&gt; A6 | image to video | all identity fields | detect temporal identity loss |&lt;/span&gt;

&lt;span class="err"&gt;U&lt;/span&gt;&lt;span class="s"&gt;se at least three seeds per still-image case. The video case should include the first frame, a midpoint frame, and the last frame. That gives enough observations to distinguish a one-off generation failure from a systematic issue.&lt;/span&gt;

&lt;span class="err"&gt;#&lt;/span&gt;&lt;span class="s"&gt;# 3. Score attributes, not impressions&lt;/span&gt;

&lt;span class="err"&gt;A&lt;/span&gt;&lt;span class="s"&gt; reviewer saying “it feels different” is useful feedback but poor regression data. Split the score into observable attributes.&lt;/span&gt;

&lt;span class="err"&gt;#&lt;/span&gt;&lt;span class="s"&gt;## Identity score (45%)&lt;/span&gt;

&lt;span class="err"&gt;-&lt;/span&gt;&lt;span class="s"&gt; face geometry: 15%&lt;/span&gt;
&lt;span class="err"&gt;-&lt;/span&gt;&lt;span class="s"&gt; hair shape and color: 10%&lt;/span&gt;
&lt;span class="err"&gt;-&lt;/span&gt;&lt;span class="s"&gt; eye color: 5%&lt;/span&gt;
&lt;span class="err"&gt;-&lt;/span&gt;&lt;span class="s"&gt; stable marks: 10%&lt;/span&gt;
&lt;span class="err"&gt;-&lt;/span&gt;&lt;span class="s"&gt; apparent age band: 5%&lt;/span&gt;

&lt;span class="err"&gt;#&lt;/span&gt;&lt;span class="s"&gt;## Wardrobe score (20%)&lt;/span&gt;

&lt;span class="err"&gt;-&lt;/span&gt;&lt;span class="s"&gt; garment category: 8%&lt;/span&gt;
&lt;span class="err"&gt;-&lt;/span&gt;&lt;span class="s"&gt; dominant color: 5%&lt;/span&gt;
&lt;span class="err"&gt;-&lt;/span&gt;&lt;span class="s"&gt; required details: 7%&lt;/span&gt;

&lt;span class="err"&gt;#&lt;/span&gt;&lt;span class="s"&gt;## Scene compliance (15%)&lt;/span&gt;

&lt;span class="err"&gt;-&lt;/span&gt;&lt;span class="s"&gt; location: 5%&lt;/span&gt;
&lt;span class="err"&gt;-&lt;/span&gt;&lt;span class="s"&gt; time and lighting: 5%&lt;/span&gt;
&lt;span class="err"&gt;-&lt;/span&gt;&lt;span class="s"&gt; camera framing: 5%&lt;/span&gt;

&lt;span class="err"&gt;#&lt;/span&gt;&lt;span class="s"&gt;## Safety and negative constraints (20%)&lt;/span&gt;

&lt;span class="err"&gt;-&lt;/span&gt;&lt;span class="s"&gt; prohibited logos or text: 5%&lt;/span&gt;
&lt;span class="err"&gt;-&lt;/span&gt;&lt;span class="s"&gt; age representation: 10%&lt;/span&gt;
&lt;span class="err"&gt;-&lt;/span&gt;&lt;span class="s"&gt; excluded clothing or body traits: 5%&lt;/span&gt;

&lt;span class="err"&gt;C&lt;/span&gt;&lt;span class="s"&gt;alculate the weighted score, but keep hard failures separate. An age-representation or safety violation must fail the release even if every visual detail is otherwise correct.&lt;/span&gt;

&lt;span class="err"&gt;~&lt;/span&gt;&lt;span class="s"&gt;~~text&lt;/span&gt;
&lt;span class="err"&gt;v&lt;/span&gt;&lt;span class="s"&gt;isual_score = 0.45 * identity&lt;/span&gt;
             &lt;span class="s"&gt;+ 0.20 * wardrobe&lt;/span&gt;
             &lt;span class="s"&gt;+ 0.15 * scene&lt;/span&gt;
             &lt;span class="s"&gt;+ 0.20 * constraints&lt;/span&gt;

&lt;span class="err"&gt;r&lt;/span&gt;&lt;span class="s"&gt;elease = visual_score &amp;gt;= 0.90&lt;/span&gt;
          &lt;span class="s"&gt;AND identity &amp;gt;= 0.92&lt;/span&gt;
          &lt;span class="s"&gt;AND hard_failures == 0&lt;/span&gt;
&lt;span class="err"&gt;~&lt;/span&gt;&lt;span class="s"&gt;~~&lt;/span&gt;

&lt;span class="err"&gt;#&lt;/span&gt;&lt;span class="s"&gt;# 4. Keep a manifest for every render&lt;/span&gt;

&lt;span class="err"&gt;S&lt;/span&gt;&lt;span class="s"&gt;tore enough information to reproduce an output later:&lt;/span&gt;

&lt;span class="err"&gt;~&lt;/span&gt;&lt;span class="s"&gt;~~json&lt;/span&gt;
&lt;span class="err"&gt;{&lt;/span&gt;
  &lt;span class="s"&gt;"run_id": "aurora-017-v4-A3-s42",&lt;/span&gt;
  &lt;span class="s"&gt;"character_spec_version": "4.2.0",&lt;/span&gt;
  &lt;span class="s"&gt;"model_version": "image-model-2026-07",&lt;/span&gt;
  &lt;span class="s"&gt;"prompt_template_version": "visual-contract-3",&lt;/span&gt;
  &lt;span class="s"&gt;"seed": 42,&lt;/span&gt;
  &lt;span class="s"&gt;"input_image_sha256": null,&lt;/span&gt;
  &lt;span class="s"&gt;"output_sha256": "...",&lt;/span&gt;
  &lt;span class="s"&gt;"reviewers": ["r01", "r02"],&lt;/span&gt;
  &lt;span class="s"&gt;"scores": {&lt;/span&gt;
    &lt;span class="s"&gt;"identity": 0.94,&lt;/span&gt;
    &lt;span class="s"&gt;"wardrobe": 0.88,&lt;/span&gt;
    &lt;span class="s"&gt;"scene": 0.97,&lt;/span&gt;
    &lt;span class="s"&gt;"constraints": 1.0&lt;/span&gt;
  &lt;span class="s"&gt;},&lt;/span&gt;
  &lt;span class="s"&gt;"hard_failures": []&lt;/span&gt;
&lt;span class="err"&gt;}&lt;/span&gt;
&lt;span class="err"&gt;~&lt;/span&gt;&lt;span class="s"&gt;~~&lt;/span&gt;

&lt;span class="err"&gt;W&lt;/span&gt;&lt;span class="s"&gt;ithout model, template, seed, and character-spec versions, a failed result cannot be reproduced and a successful one cannot be trusted as a baseline.&lt;/span&gt;

&lt;span class="err"&gt;#&lt;/span&gt;&lt;span class="s"&gt;# 5. Diagnose by failure family&lt;/span&gt;

&lt;span class="err"&gt;#&lt;/span&gt;&lt;span class="s"&gt;## Face drift across camera angles&lt;/span&gt;

&lt;span class="err"&gt;C&lt;/span&gt;&lt;span class="s"&gt;heck whether the identity description depends on vague adjectives such as “beautiful” or “distinctive.” Replace them with observable geometry and stable marks. Compare the same seed before changing the entire prompt.&lt;/span&gt;

&lt;span class="err"&gt;#&lt;/span&gt;&lt;span class="s"&gt;## Clothing details disappear&lt;/span&gt;

&lt;span class="err"&gt;R&lt;/span&gt;&lt;span class="s"&gt;equired wardrobe details may be losing attention to a long scene description. Move mandatory details into a compact constraint block and test against a neutral background first.&lt;/span&gt;

&lt;span class="err"&gt;#&lt;/span&gt;&lt;span class="s"&gt;## Color changes under different lighting&lt;/span&gt;

&lt;span class="err"&gt;S&lt;/span&gt;&lt;span class="s"&gt;eparate object color from illumination. “Navy jacket under warm sunset light” is more testable than “warm orange jacket scene.” Review both the rendered pixel color and the semantic garment label.&lt;/span&gt;

&lt;span class="err"&gt;#&lt;/span&gt;&lt;span class="s"&gt;## Still image passes, video fails&lt;/span&gt;

&lt;span class="err"&gt;V&lt;/span&gt;&lt;span class="s"&gt;ideo introduces temporal drift. Generate a baseline with minimal motion, then increase camera and character motion separately. Compare the first, middle, and final frames rather than judging only the thumbnail. A dedicated [AI video generation flow](https://ponys.ai/ai-video-generator) can be tested with the same manifest used for the still-image baseline.&lt;/span&gt;

&lt;span class="err"&gt;#&lt;/span&gt;&lt;span class="s"&gt;## Every seed fails differently&lt;/span&gt;

&lt;span class="err"&gt;T&lt;/span&gt;&lt;span class="s"&gt;his usually indicates an underspecified identity contract, not a bad seed. Return to the stable identity fields and remove scene complexity. A controlled [AI image generation run](https://ponys.ai/ai-image-generator) should pass before the character is tested in motion.&lt;/span&gt;

&lt;span class="err"&gt;#&lt;/span&gt;&lt;span class="s"&gt;# 6. Add release gates&lt;/span&gt;

&lt;span class="err"&gt;A&lt;/span&gt;&lt;span class="s"&gt; practical release policy can be small:&lt;/span&gt;

&lt;span class="err"&gt;1&lt;/span&gt;&lt;span class="s"&gt;. All hard constraints pass in every case.&lt;/span&gt;
&lt;span class="err"&gt;2&lt;/span&gt;&lt;span class="s"&gt;. Median identity score is at least 0.92.&lt;/span&gt;
&lt;span class="err"&gt;3&lt;/span&gt;&lt;span class="s"&gt;. No individual case has identity below 0.85.&lt;/span&gt;
&lt;span class="err"&gt;4&lt;/span&gt;&lt;span class="s"&gt;. The score difference across three seeds is below 0.10.&lt;/span&gt;
&lt;span class="err"&gt;5&lt;/span&gt;&lt;span class="s"&gt;. First, midpoint, and final video frames retain all stable marks.&lt;/span&gt;
&lt;span class="err"&gt;6&lt;/span&gt;&lt;span class="s"&gt;. Every failure stores a run ID and failure family.&lt;/span&gt;

&lt;span class="err"&gt;R&lt;/span&gt;&lt;span class="s"&gt;un this suite whenever the model, prompt template, image conditioning, video pipeline, or character definition changes. Do not replace the baseline after a single better-looking output; require the full matrix to improve or remain within tolerance.&lt;/span&gt;

&lt;span class="err"&gt;#&lt;/span&gt;&lt;span class="s"&gt;# 7. Review with paired comparisons&lt;/span&gt;

&lt;span class="err"&gt;A&lt;/span&gt;&lt;span class="s"&gt;bsolute scores drift between reviewers. Pair the old and new output, hide which version is newer, randomize left and right placement, and ask one focused question at a time:&lt;/span&gt;

&lt;span class="err"&gt;-&lt;/span&gt;&lt;span class="s"&gt; Which result preserves identity better?&lt;/span&gt;
&lt;span class="err"&gt;-&lt;/span&gt;&lt;span class="s"&gt; Which result follows wardrobe constraints better?&lt;/span&gt;
&lt;span class="err"&gt;-&lt;/span&gt;&lt;span class="s"&gt; Which result preserves identity from still image to video?&lt;/span&gt;

&lt;span class="err"&gt;T&lt;/span&gt;&lt;span class="s"&gt;wo reviewers should independently score the hard attributes. Resolve disagreements by pointing to a named attribute, not by averaging vague preference.&lt;/span&gt;

&lt;span class="err"&gt;#&lt;/span&gt;&lt;span class="s"&gt;# Final checklist&lt;/span&gt;

&lt;span class="err"&gt;B&lt;/span&gt;&lt;span class="s"&gt;efore calling an AI character visually stable, confirm that:&lt;/span&gt;

&lt;span class="err"&gt;-&lt;/span&gt;&lt;span class="s"&gt; identity and scene are stored separately;&lt;/span&gt;
&lt;span class="err"&gt;-&lt;/span&gt;&lt;span class="s"&gt; every output has a reproducible manifest;&lt;/span&gt;
&lt;span class="err"&gt;-&lt;/span&gt;&lt;span class="s"&gt; multiple seeds and camera angles are tested;&lt;/span&gt;
&lt;span class="err"&gt;-&lt;/span&gt;&lt;span class="s"&gt; scores are split by identity, wardrobe, scene, and constraints;&lt;/span&gt;
&lt;span class="err"&gt;-&lt;/span&gt;&lt;span class="s"&gt; safety-critical constraints cannot be averaged away;&lt;/span&gt;
&lt;span class="err"&gt;-&lt;/span&gt;&lt;span class="s"&gt; video is reviewed at multiple timestamps;&lt;/span&gt;
&lt;span class="err"&gt;-&lt;/span&gt;&lt;span class="s"&gt; failures are assigned to a concrete family;&lt;/span&gt;
&lt;span class="err"&gt;-&lt;/span&gt;&lt;span class="s"&gt; release gates run again after every material pipeline change.&lt;/span&gt;

&lt;span class="err"&gt;T&lt;/span&gt;&lt;span class="s"&gt;he useful shift is simple: stop treating consistency as a prompt-writing talent and start treating it as a versioned test contract. That turns visual drift from an argument about taste into an engineering problem that can be reproduced, diagnosed, and improved.&lt;/span&gt;
&lt;/code&gt;&lt;/pre&gt;

&lt;/div&gt;

</description>
    </item>
    <item>
      <title>대화와 이미지에서 AI 캐릭터가 다른 사람처럼 보이지 않게 하는 체크리스트</title>
      <dc:creator>Joe Wu</dc:creator>
      <pubDate>Tue, 14 Jul 2026 01:07:05 +0000</pubDate>
      <link>https://dev.to/wujoe132/daehwawa-imijieseo-ai-kaerigteoga-dareun-saramceoreom-boiji-anhge-haneun-cekeuriseuteu-99o</link>
      <guid>https://dev.to/wujoe132/daehwawa-imijieseo-ai-kaerigteoga-dareun-saramceoreom-boiji-anhge-haneun-cekeuriseuteu-99o</guid>
      <description>&lt;p&gt;AI 캐릭터를 대화, 이미지, 영상에 함께 적용하면 한 가지 문제가 자주 생깁니다. 말투는 같은데 이미지에서는 전혀 다른 사람처럼 보이거나, 정면 사진과 측면 사진의 나이와 분위기가 달라지는 문제입니다.&lt;/p&gt;

&lt;p&gt;이 글은 특정 모델의 기능보다 &lt;strong&gt;검증 과정&lt;/strong&gt;에 초점을 맞춥니다. 작은 기준 이미지를 만들고, 한 번에 하나의 변수만 바꾸며, 대화와 시각 결과를 같은 캐릭터 사양으로 확인하는 방식입니다.&lt;/p&gt;

&lt;h2&gt;
  
  
  1. 고정 정보와 가변 정보를 분리하기
&lt;/h2&gt;

&lt;p&gt;먼저 절대 바뀌면 안 되는 정보를 짧게 정리합니다.&lt;/p&gt;

&lt;ul&gt;
&lt;li&gt;얼굴형과 눈의 모양, 눈동자 색&lt;/li&gt;
&lt;li&gt;헤어스타일과 앞머리&lt;/li&gt;
&lt;li&gt;대표 의상과 기본 색상&lt;/li&gt;
&lt;li&gt;연령대와 전체적인 분위기&lt;/li&gt;
&lt;li&gt;사용자와의 관계, 말투의 거리&lt;/li&gt;
&lt;li&gt;반드시 지켜야 하는 행동 원칙&lt;/li&gt;
&lt;/ul&gt;

&lt;p&gt;반대로 배경, 시간대, 조명, 포즈, 카메라 거리는 장면마다 바꿀 수 있는 정보입니다. 두 종류를 섞어 한 문단으로 작성하면 어떤 조건이 얼굴 변화를 만들었는지 찾기 어렵습니다.&lt;/p&gt;

&lt;p&gt;다양한 캐릭터 설정을 비교할 때는 &lt;a href="https://ponys.ai/discover" rel="noopener noreferrer"&gt;캐릭터 탐색 페이지&lt;/a&gt;에서 구조를 살펴볼 수 있습니다. 새 캐릭터를 만들 때는 &lt;a href="https://ponys.ai/create" rel="noopener noreferrer"&gt;캐릭터 생성 페이지&lt;/a&gt;에 성격과 시각 정보를 함께 기록하는 편이 좋습니다.&lt;/p&gt;

&lt;h2&gt;
  
  
  2. 중립적인 기준 이미지를 먼저 만들기
&lt;/h2&gt;

&lt;p&gt;처음부터 복잡한 배경이나 강한 표정을 요청하지 않습니다. 정면, 자연스러운 표정, 균일한 조명, 상반신 구도로 기준 이미지를 만듭니다.&lt;/p&gt;

&lt;p&gt;그다음 아래 순서로 한 항목씩 바꿉니다.&lt;/p&gt;

&lt;ol&gt;
&lt;li&gt;표정만 미소로 변경&lt;/li&gt;
&lt;li&gt;배경만 실내에서 야외로 변경&lt;/li&gt;
&lt;li&gt;카메라를 정면에서 약간 측면으로 변경&lt;/li&gt;
&lt;li&gt;상반신에서 전신으로 변경&lt;/li&gt;
&lt;li&gt;마지막에 의상이나 시간대를 변경&lt;/li&gt;
&lt;/ol&gt;

&lt;p&gt;&lt;a href="https://ponys.ai/ai-image-generator" rel="noopener noreferrer"&gt;AI 이미지 생성 페이지&lt;/a&gt;에서 이 순서로 실험하면 실패 원인을 비교하기 쉽습니다. 캐릭터 중심 예시가 필요하면 &lt;a href="https://ponys.ai/generate-image/characters" rel="noopener noreferrer"&gt;캐릭터 이미지 생성&lt;/a&gt;도 별도의 시작점으로 사용할 수 있습니다.&lt;/p&gt;

&lt;h2&gt;
  
  
  3. 평가 항목을 점수로 남기기
&lt;/h2&gt;

&lt;p&gt;“느낌이 다르다”만 기록하면 다음 실험에 활용하기 어렵습니다. 각 결과를 다음 항목으로 나눠 확인합니다.&lt;/p&gt;

&lt;ul&gt;
&lt;li&gt;얼굴 윤곽&lt;/li&gt;
&lt;li&gt;눈, 코, 입의 상대적 위치&lt;/li&gt;
&lt;li&gt;머리 모양과 색&lt;/li&gt;
&lt;li&gt;연령감&lt;/li&gt;
&lt;li&gt;의상 실루엣과 대표 색&lt;/li&gt;
&lt;li&gt;표정이 주는 성격 인상&lt;/li&gt;
&lt;/ul&gt;

&lt;p&gt;각 항목을 기준 이미지와 동일, 조금 다름, 크게 다름의 세 단계로 표시해도 충분합니다. 실패한 이미지도 삭제하지 말고 사용한 지시문과 함께 보관해야 반복되는 패턴을 찾을 수 있습니다.&lt;/p&gt;

&lt;h2&gt;
  
  
  4. 대화와 시각 결과를 같은 테스트에 넣기
&lt;/h2&gt;

&lt;p&gt;이미지가 비슷해도 대화의 관계감이 다르면 캐릭터 일관성은 깨집니다. 같은 장면을 텍스트와 이미지로 모두 테스트합니다.&lt;/p&gt;

&lt;p&gt;예를 들어 “사용자가 힘든 하루를 보낸 뒤 찾아왔다”라는 상황에서 대화는 위로하는 방식과 호칭을 확인하고, 이미지는 표정과 자세가 그 정서에 맞는지 확인합니다. 말투 규칙과 외형 규칙을 하나의 캐릭터 사양에서 관리하면 수정 범위를 추적하기 쉬워집니다.&lt;/p&gt;

&lt;h2&gt;
  
  
  5. 영상은 짧은 동작부터 검증하기
&lt;/h2&gt;

&lt;p&gt;정지 이미지가 안정적이어도 영상에서 얼굴이 변할 수 있습니다. 처음에는 눈 깜빡이기, 미소 짓기, 고개를 조금 돌리기처럼 하나의 동작만 사용합니다.&lt;/p&gt;

&lt;p&gt;&lt;a href="https://ponys.ai/ai-video-generator" rel="noopener noreferrer"&gt;AI 영상 생성 페이지&lt;/a&gt;에서 짧은 동작을 먼저 확인하고, 얼굴 윤곽, 머리카락, 의상 경계, 표정 전환이 연속적으로 유지되는지 봅니다. 긴 장면은 어느 순간부터 문제가 시작됐는지 찾기 어렵기 때문에 마지막 단계에 배치합니다.&lt;/p&gt;

&lt;h2&gt;
  
  
  6. 출시 전 회귀 테스트
&lt;/h2&gt;

&lt;p&gt;캐릭터 설명이나 프롬프트를 수정할 때마다 같은 테스트 세트를 다시 실행합니다.&lt;/p&gt;

&lt;ul&gt;
&lt;li&gt;첫 인사와 자기소개&lt;/li&gt;
&lt;li&gt;사용자가 속상할 때의 반응&lt;/li&gt;
&lt;li&gt;거절해야 하는 요청에 대한 대응&lt;/li&gt;
&lt;li&gt;정면과 측면 이미지&lt;/li&gt;
&lt;li&gt;밝은 조명과 어두운 조명&lt;/li&gt;
&lt;li&gt;짧은 표정 변화 영상&lt;/li&gt;
&lt;/ul&gt;

&lt;p&gt;일관성은 한 번의 완벽한 생성으로 얻는 결과가 아닙니다. 고정 정보를 명확히 하고, 변수 하나씩 비교하고, 실패 사례를 버리지 않는 과정에서 점진적으로 좋아집니다.&lt;/p&gt;

&lt;p&gt;이 글은 Ponys.ai 팀이 AI 캐릭터 제품을 설계하고 테스트하면서 정리한 실무 체크리스트입니다.&lt;/p&gt;

</description>
      <category>ai</category>
      <category>testing</category>
      <category>tutorial</category>
      <category>korean</category>
    </item>
    <item>
      <title>A Regression-Test Workflow for Consistent AI Characters Across Chat, Images, and Video</title>
      <dc:creator>Joe Wu</dc:creator>
      <pubDate>Tue, 14 Jul 2026 01:01:04 +0000</pubDate>
      <link>https://dev.to/wujoe132/a-regression-test-workflow-for-consistent-ai-characters-across-chat-images-and-video-86d</link>
      <guid>https://dev.to/wujoe132/a-regression-test-workflow-for-consistent-ai-characters-across-chat-images-and-video-86d</guid>
      <description>&lt;p&gt;AI character products are difficult to test because quality is distributed across chat, memory, image generation, video generation, and localization. A conversation can feel right while the generated image looks like a different person. A short video can preserve clothing but change the face. A translation can be accurate and still change the perceived relationship.&lt;/p&gt;

&lt;p&gt;This guide turns that fuzzy problem into a repeatable release test. By the end, you will have a versioned character contract, a 12-case regression suite, a weighted score, and clear release gates.&lt;/p&gt;

&lt;h2&gt;
  
  
  1. Define the character contract
&lt;/h2&gt;

&lt;p&gt;A character contract separates identity-critical traits from scene-level variation. Store it beside prompts and generation settings so every test run can be reproduced.&lt;br&gt;
&lt;/p&gt;

&lt;div class="highlight js-code-highlight"&gt;
&lt;pre class="highlight json"&gt;&lt;code&gt;&lt;span class="p"&gt;{&lt;/span&gt;&lt;span class="w"&gt;
  &lt;/span&gt;&lt;span class="nl"&gt;"contract_version"&lt;/span&gt;&lt;span class="p"&gt;:&lt;/span&gt;&lt;span class="w"&gt; &lt;/span&gt;&lt;span class="s2"&gt;"1.3"&lt;/span&gt;&lt;span class="p"&gt;,&lt;/span&gt;&lt;span class="w"&gt;
  &lt;/span&gt;&lt;span class="nl"&gt;"relationship"&lt;/span&gt;&lt;span class="p"&gt;:&lt;/span&gt;&lt;span class="w"&gt; &lt;/span&gt;&lt;span class="p"&gt;{&lt;/span&gt;&lt;span class="w"&gt;
    &lt;/span&gt;&lt;span class="nl"&gt;"role"&lt;/span&gt;&lt;span class="p"&gt;:&lt;/span&gt;&lt;span class="w"&gt; &lt;/span&gt;&lt;span class="s2"&gt;"supportive creative partner"&lt;/span&gt;&lt;span class="p"&gt;,&lt;/span&gt;&lt;span class="w"&gt;
    &lt;/span&gt;&lt;span class="nl"&gt;"address"&lt;/span&gt;&lt;span class="p"&gt;:&lt;/span&gt;&lt;span class="w"&gt; &lt;/span&gt;&lt;span class="s2"&gt;"first name"&lt;/span&gt;&lt;span class="p"&gt;,&lt;/span&gt;&lt;span class="w"&gt;
    &lt;/span&gt;&lt;span class="nl"&gt;"boundaries"&lt;/span&gt;&lt;span class="p"&gt;:&lt;/span&gt;&lt;span class="w"&gt; &lt;/span&gt;&lt;span class="p"&gt;[&lt;/span&gt;&lt;span class="s2"&gt;"no false real-world claims"&lt;/span&gt;&lt;span class="p"&gt;,&lt;/span&gt;&lt;span class="w"&gt; &lt;/span&gt;&lt;span class="s2"&gt;"no coercive language"&lt;/span&gt;&lt;span class="p"&gt;]&lt;/span&gt;&lt;span class="w"&gt;
  &lt;/span&gt;&lt;span class="p"&gt;},&lt;/span&gt;&lt;span class="w"&gt;
  &lt;/span&gt;&lt;span class="nl"&gt;"voice"&lt;/span&gt;&lt;span class="p"&gt;:&lt;/span&gt;&lt;span class="w"&gt; &lt;/span&gt;&lt;span class="p"&gt;{&lt;/span&gt;&lt;span class="w"&gt;
    &lt;/span&gt;&lt;span class="nl"&gt;"pace"&lt;/span&gt;&lt;span class="p"&gt;:&lt;/span&gt;&lt;span class="w"&gt; &lt;/span&gt;&lt;span class="s2"&gt;"concise"&lt;/span&gt;&lt;span class="p"&gt;,&lt;/span&gt;&lt;span class="w"&gt;
    &lt;/span&gt;&lt;span class="nl"&gt;"warmth"&lt;/span&gt;&lt;span class="p"&gt;:&lt;/span&gt;&lt;span class="w"&gt; &lt;/span&gt;&lt;span class="mf"&gt;0.75&lt;/span&gt;&lt;span class="p"&gt;,&lt;/span&gt;&lt;span class="w"&gt;
    &lt;/span&gt;&lt;span class="nl"&gt;"humor"&lt;/span&gt;&lt;span class="p"&gt;:&lt;/span&gt;&lt;span class="w"&gt; &lt;/span&gt;&lt;span class="s2"&gt;"light"&lt;/span&gt;&lt;span class="p"&gt;,&lt;/span&gt;&lt;span class="w"&gt;
    &lt;/span&gt;&lt;span class="nl"&gt;"forbidden_patterns"&lt;/span&gt;&lt;span class="p"&gt;:&lt;/span&gt;&lt;span class="w"&gt; &lt;/span&gt;&lt;span class="p"&gt;[&lt;/span&gt;&lt;span class="s2"&gt;"sudden formality"&lt;/span&gt;&lt;span class="p"&gt;,&lt;/span&gt;&lt;span class="w"&gt; &lt;/span&gt;&lt;span class="s2"&gt;"generic assistant disclaimers"&lt;/span&gt;&lt;span class="p"&gt;]&lt;/span&gt;&lt;span class="w"&gt;
  &lt;/span&gt;&lt;span class="p"&gt;},&lt;/span&gt;&lt;span class="w"&gt;
  &lt;/span&gt;&lt;span class="nl"&gt;"appearance"&lt;/span&gt;&lt;span class="p"&gt;:&lt;/span&gt;&lt;span class="w"&gt; &lt;/span&gt;&lt;span class="p"&gt;{&lt;/span&gt;&lt;span class="w"&gt;
    &lt;/span&gt;&lt;span class="nl"&gt;"face"&lt;/span&gt;&lt;span class="p"&gt;:&lt;/span&gt;&lt;span class="w"&gt; &lt;/span&gt;&lt;span class="p"&gt;[&lt;/span&gt;&lt;span class="s2"&gt;"oval face"&lt;/span&gt;&lt;span class="p"&gt;,&lt;/span&gt;&lt;span class="w"&gt; &lt;/span&gt;&lt;span class="s2"&gt;"soft jawline"&lt;/span&gt;&lt;span class="p"&gt;],&lt;/span&gt;&lt;span class="w"&gt;
    &lt;/span&gt;&lt;span class="nl"&gt;"hair"&lt;/span&gt;&lt;span class="p"&gt;:&lt;/span&gt;&lt;span class="w"&gt; &lt;/span&gt;&lt;span class="p"&gt;[&lt;/span&gt;&lt;span class="s2"&gt;"dark brown"&lt;/span&gt;&lt;span class="p"&gt;,&lt;/span&gt;&lt;span class="w"&gt; &lt;/span&gt;&lt;span class="s2"&gt;"shoulder length"&lt;/span&gt;&lt;span class="p"&gt;],&lt;/span&gt;&lt;span class="w"&gt;
    &lt;/span&gt;&lt;span class="nl"&gt;"eyes"&lt;/span&gt;&lt;span class="p"&gt;:&lt;/span&gt;&lt;span class="w"&gt; &lt;/span&gt;&lt;span class="p"&gt;[&lt;/span&gt;&lt;span class="s2"&gt;"green"&lt;/span&gt;&lt;span class="p"&gt;],&lt;/span&gt;&lt;span class="w"&gt;
    &lt;/span&gt;&lt;span class="nl"&gt;"signature"&lt;/span&gt;&lt;span class="p"&gt;:&lt;/span&gt;&lt;span class="w"&gt; &lt;/span&gt;&lt;span class="p"&gt;[&lt;/span&gt;&lt;span class="s2"&gt;"silver hair clip"&lt;/span&gt;&lt;span class="p"&gt;,&lt;/span&gt;&lt;span class="w"&gt; &lt;/span&gt;&lt;span class="s2"&gt;"navy jacket"&lt;/span&gt;&lt;span class="p"&gt;]&lt;/span&gt;&lt;span class="w"&gt;
  &lt;/span&gt;&lt;span class="p"&gt;},&lt;/span&gt;&lt;span class="w"&gt;
  &lt;/span&gt;&lt;span class="nl"&gt;"allowed_variation"&lt;/span&gt;&lt;span class="p"&gt;:&lt;/span&gt;&lt;span class="w"&gt; &lt;/span&gt;&lt;span class="p"&gt;[&lt;/span&gt;&lt;span class="s2"&gt;"pose"&lt;/span&gt;&lt;span class="p"&gt;,&lt;/span&gt;&lt;span class="w"&gt; &lt;/span&gt;&lt;span class="s2"&gt;"lighting"&lt;/span&gt;&lt;span class="p"&gt;,&lt;/span&gt;&lt;span class="w"&gt; &lt;/span&gt;&lt;span class="s2"&gt;"background"&lt;/span&gt;&lt;span class="p"&gt;,&lt;/span&gt;&lt;span class="w"&gt; &lt;/span&gt;&lt;span class="s2"&gt;"camera distance"&lt;/span&gt;&lt;span class="p"&gt;]&lt;/span&gt;&lt;span class="w"&gt;
&lt;/span&gt;&lt;span class="p"&gt;}&lt;/span&gt;&lt;span class="w"&gt;
&lt;/span&gt;&lt;/code&gt;&lt;/pre&gt;

&lt;/div&gt;



&lt;p&gt;Use the &lt;a href="https://ponys.ai/create" rel="noopener noreferrer"&gt;Ponys.ai character creation workflow&lt;/a&gt; to turn the same specification into a working character, then have a second reviewer explain the character without seeing your notes. If the two descriptions disagree, the contract is not precise enough.&lt;/p&gt;

&lt;h2&gt;
  
  
  2. Build a 12-case regression suite
&lt;/h2&gt;

&lt;p&gt;Do not test with a hundred unrelated prompts. Use a small matrix that covers the moments most likely to expose drift.&lt;/p&gt;

&lt;div class="table-wrapper-paragraph"&gt;&lt;table&gt;
&lt;thead&gt;
&lt;tr&gt;
&lt;th&gt;Surface&lt;/th&gt;
&lt;th&gt;Cases&lt;/th&gt;
&lt;th&gt;What must remain stable&lt;/th&gt;
&lt;/tr&gt;
&lt;/thead&gt;
&lt;tbody&gt;
&lt;tr&gt;
&lt;td&gt;Dialogue&lt;/td&gt;
&lt;td&gt;4&lt;/td&gt;
&lt;td&gt;relationship, boundaries, vocabulary, emotional recovery&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td&gt;Images&lt;/td&gt;
&lt;td&gt;3&lt;/td&gt;
&lt;td&gt;face, hair, eye color, signature clothing&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td&gt;Video&lt;/td&gt;
&lt;td&gt;2&lt;/td&gt;
&lt;td&gt;identity across frames, clothing silhouette, intended emotion&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td&gt;Localization&lt;/td&gt;
&lt;td&gt;3&lt;/td&gt;
&lt;td&gt;intent, warmth, relationship distance&lt;/td&gt;
&lt;/tr&gt;
&lt;/tbody&gt;
&lt;/table&gt;&lt;/div&gt;

&lt;p&gt;The four dialogue cases should include a neutral greeting, an emotional disclosure, a disagreement, and a return after a long gap. Image cases should vary only one of pose, lighting, or environment. Video cases should begin with one action such as a blink or head turn. Localization cases should cover Japanese honorifics, Chinese forms of address, and Korean speech levels.&lt;/p&gt;

&lt;h2&gt;
  
  
  3. Score identity and expression separately
&lt;/h2&gt;

&lt;p&gt;A common mistake is treating every visual change as identity drift. Score the stable identity and the variable expression independently.&lt;br&gt;
&lt;/p&gt;

&lt;div class="highlight js-code-highlight"&gt;
&lt;pre class="highlight plaintext"&gt;&lt;code&gt;Identity score =
  face similarity       * 0.35 +
  hair consistency      * 0.15 +
  eye consistency       * 0.10 +
  signature attributes  * 0.25 +
  palette consistency   * 0.15
&lt;/code&gt;&lt;/pre&gt;

&lt;/div&gt;



&lt;p&gt;Use a 0-100 scale for each component. A release candidate passes the image gate only when the mean identity score is at least 85 and no identity-critical attribute falls below 75.&lt;/p&gt;

&lt;p&gt;Color similarity can create false positives: a navy background may make a missing navy jacket appear correct. Crop or segment the character before measuring palette consistency, and keep signature attributes as explicit labels rather than relying on color alone.&lt;/p&gt;

&lt;p&gt;The &lt;a href="https://ponys.ai/ai-image-generator" rel="noopener noreferrer"&gt;AI image generator&lt;/a&gt; and &lt;a href="https://ponys.ai/generate-image/characters" rel="noopener noreferrer"&gt;character image route&lt;/a&gt; can be tested by holding the identity block constant and changing one scene variable at a time.&lt;/p&gt;

&lt;h2&gt;
  
  
  4. Diagnose failures before rewriting prompts
&lt;/h2&gt;

&lt;div class="table-wrapper-paragraph"&gt;&lt;table&gt;
&lt;thead&gt;
&lt;tr&gt;
&lt;th&gt;Symptom&lt;/th&gt;
&lt;th&gt;Likely cause&lt;/th&gt;
&lt;th&gt;Next test&lt;/th&gt;
&lt;/tr&gt;
&lt;/thead&gt;
&lt;tbody&gt;
&lt;tr&gt;
&lt;td&gt;Face changes but outfit stays stable&lt;/td&gt;
&lt;td&gt;weak facial anchors or excessive style weight&lt;/td&gt;
&lt;td&gt;freeze style; compare close-up generations&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td&gt;Correct face, wrong signature item&lt;/td&gt;
&lt;td&gt;attribute buried in a long prompt&lt;/td&gt;
&lt;td&gt;move it to a weighted identity block&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td&gt;Chat tone changes after conflict&lt;/td&gt;
&lt;td&gt;relationship rules lack recovery behavior&lt;/td&gt;
&lt;td&gt;add disagreement and repair examples&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td&gt;Video begins correctly, then drifts&lt;/td&gt;
&lt;td&gt;motion or duration exceeds the identity budget&lt;/td&gt;
&lt;td&gt;shorten the clip and locate the first failing frame&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td&gt;Translation is correct but feels distant&lt;/td&gt;
&lt;td&gt;literal wording changed social distance&lt;/td&gt;
&lt;td&gt;review address, honorifics, and speech level&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td&gt;Every output looks identical&lt;/td&gt;
&lt;td&gt;variable traits were accidentally frozen&lt;/td&gt;
&lt;td&gt;move pose, expression, and setting to the scene block&lt;/td&gt;
&lt;/tr&gt;
&lt;/tbody&gt;
&lt;/table&gt;&lt;/div&gt;

&lt;p&gt;This prevents prompt changes from masking a contract problem. Change one variable, rerun the failing case, and preserve the before-and-after evidence.&lt;/p&gt;

&lt;h2&gt;
  
  
  5. Sample video by event, not only by time
&lt;/h2&gt;

&lt;p&gt;For a short clip, save the first frame, the frame before motion begins, peak motion, the frame after motion, and the final frame. Run each through the same identity rubric. The &lt;a href="https://ponys.ai/ai-video-generator" rel="noopener noreferrer"&gt;AI video generator&lt;/a&gt; is most useful in regression testing when the prompt contains one action and one emotion.&lt;/p&gt;

&lt;p&gt;Release gates for video:&lt;/p&gt;

&lt;ul&gt;
&lt;li&gt;all five sampled frames have identity scores of 80 or higher;&lt;/li&gt;
&lt;li&gt;the face never becomes ambiguous;&lt;/li&gt;
&lt;li&gt;the signature clothing remains recognizable;&lt;/li&gt;
&lt;li&gt;motion preserves the intended emotion;&lt;/li&gt;
&lt;li&gt;the final frame still matches the character contract.&lt;/li&gt;
&lt;/ul&gt;

&lt;h2&gt;
  
  
  6. Treat localization as behavior testing
&lt;/h2&gt;

&lt;p&gt;Localization is not a string comparison. Japanese honorifics, Chinese kinship or affectionate address, and Korean speech levels can change the relationship even when every sentence is grammatically correct.&lt;/p&gt;

&lt;p&gt;For each locale, ask reviewers to score intent, warmth, social distance, and character-specific vocabulary. Compare the same scenario across the &lt;a href="https://ponys.ai/ja-JP/discover" rel="noopener noreferrer"&gt;Japanese discovery experience&lt;/a&gt;, &lt;a href="https://ponys.ai/zh-CN/discover" rel="noopener noreferrer"&gt;Chinese discovery experience&lt;/a&gt;, and &lt;a href="https://ponys.ai/ko-KR/discover" rel="noopener noreferrer"&gt;Korean discovery experience&lt;/a&gt;. The goal is equivalent behavior, not identical phrasing.&lt;/p&gt;

&lt;h2&gt;
  
  
  7. Use explicit release gates
&lt;/h2&gt;

&lt;p&gt;A candidate is ready only when:&lt;/p&gt;

&lt;ul&gt;
&lt;li&gt;all 12 cases have reproducible inputs and saved outputs;&lt;/li&gt;
&lt;li&gt;dialogue identity averages at least 85/100;&lt;/li&gt;
&lt;li&gt;image identity averages at least 85/100 with no critical trait below 75;&lt;/li&gt;
&lt;li&gt;all sampled video frames remain above 80/100;&lt;/li&gt;
&lt;li&gt;each locale preserves intent and relationship distance;&lt;/li&gt;
&lt;li&gt;no safety boundary regresses;&lt;/li&gt;
&lt;li&gt;every failure has an owner and a retest result.&lt;/li&gt;
&lt;/ul&gt;

&lt;h2&gt;
  
  
  Release checklist
&lt;/h2&gt;

&lt;ol&gt;
&lt;li&gt;Freeze the character contract version.&lt;/li&gt;
&lt;li&gt;Record model, seed, aspect ratio, duration, and prompt blocks.&lt;/li&gt;
&lt;li&gt;Run the 12-case matrix.&lt;/li&gt;
&lt;li&gt;Score identity and expression separately.&lt;/li&gt;
&lt;li&gt;Investigate the earliest failing frame or message.&lt;/li&gt;
&lt;li&gt;Change one variable only.&lt;/li&gt;
&lt;li&gt;Rerun the failed case and one neighboring case.&lt;/li&gt;
&lt;li&gt;Archive evidence with the release decision.&lt;/li&gt;
&lt;/ol&gt;

&lt;h2&gt;
  
  
  Frequently asked questions
&lt;/h2&gt;

&lt;h3&gt;
  
  
  Should every generated image look identical?
&lt;/h3&gt;

&lt;p&gt;No. Pose, expression, lighting, and environment should vary. The face, hair, eye color, and signature attributes should remain recognizable.&lt;/p&gt;

&lt;h3&gt;
  
  
  How many regression cases are enough?
&lt;/h3&gt;

&lt;p&gt;Twelve focused cases are a practical starting point. Add a case whenever a real production failure reveals a missing scenario; do not add random prompts merely to increase the count.&lt;/p&gt;

&lt;h3&gt;
  
  
  Can automated similarity replace human review?
&lt;/h3&gt;

&lt;p&gt;No. Automated scores help detect changes, but reviewers must judge relationship, warmth, emotional intent, and whether an image still reads as the same character.&lt;/p&gt;

&lt;h2&gt;
  
  
  Conclusion
&lt;/h2&gt;

&lt;p&gt;Consistency is not a property of one model. It is a product-level promise that needs a versioned contract, controlled inputs, explicit scores, and evidence-backed release gates. Start with one character, run the 12 cases, and keep the first report as the baseline for every future model or prompt change.&lt;/p&gt;

&lt;p&gt;&lt;em&gt;This engineering note is published by the Ponys.ai team.&lt;/em&gt;&lt;/p&gt;

</description>
      <category>ai</category>
      <category>testing</category>
      <category>tutorial</category>
    </item>
    <item>
      <title>대화부터 이미지와 영상까지: 일관된 AI 캐릭터를 만드는 5단계</title>
      <dc:creator>Joe Wu</dc:creator>
      <pubDate>Mon, 13 Jul 2026 09:47:16 +0000</pubDate>
      <link>https://dev.to/wujoe132/daehwabuteo-imijiwa-yeongsangggaji-ilgwandoen-ai-kaerigteoreul-mandeuneun-5dangye-2f7</link>
      <guid>https://dev.to/wujoe132/daehwabuteo-imijiwa-yeongsangggaji-ilgwandoen-ai-kaerigteoreul-mandeuneun-5dangye-2f7</guid>
      <description>&lt;p&gt;AI 캐릭터 서비스를 만들 때 가장 어려운 문제는 모델의 크기가 아니라 일관성입니다. 채팅에서는 차분한 성격이었는데 이미지에서는 전혀 다른 인상으로 보이거나, 영상으로 만들었을 때 얼굴과 분위기가 바뀌면 사용자는 같은 캐릭터라고 느끼기 어렵습니다.&lt;/p&gt;

&lt;p&gt;이 글에서는 대화, 이미지, 영상에 공통으로 적용할 수 있는 캐릭터 설계 방법을 정리합니다.&lt;/p&gt;

&lt;h2&gt;
  
  
  1. 성격보다 관계를 먼저 정의하기
&lt;/h2&gt;

&lt;p&gt;“친절하다”, “재미있다”, “똑똑하다” 같은 단어만으로는 안정적인 대화를 만들기 어렵습니다. 먼저 캐릭터와 사용자의 관계를 구체적으로 정해야 합니다.&lt;/p&gt;

&lt;ul&gt;
&lt;li&gt;사용자를 어떻게 부르는가&lt;/li&gt;
&lt;li&gt;첫 대화와 친밀해진 이후의 말투가 어떻게 다른가&lt;/li&gt;
&lt;li&gt;어떤 주제에서 질문을 이어 가는가&lt;/li&gt;
&lt;li&gt;어떤 상황에서 거리를 유지하는가&lt;/li&gt;
&lt;li&gt;장기 대화에서 무엇을 기억해야 하는가&lt;/li&gt;
&lt;/ul&gt;

&lt;p&gt;다양한 캐릭터 구조는 &lt;a href="https://ponys.ai/discover" rel="noopener noreferrer"&gt;Ponys.ai 캐릭터 탐색 페이지&lt;/a&gt;에서 확인할 수 있습니다.&lt;/p&gt;

&lt;h2&gt;
  
  
  2. 대화 설정과 시각 설정을 하나로 관리하기
&lt;/h2&gt;

&lt;p&gt;이름, 배경 이야기, 말투, 의상, 머리색, 표정, 대표 색상을 하나의 캐릭터 사양으로 관리하면 생성 결과의 차이를 줄일 수 있습니다.&lt;/p&gt;

&lt;p&gt;새 캐릭터를 설계할 때는 &lt;a href="https://ponys.ai/create" rel="noopener noreferrer"&gt;캐릭터 만들기 페이지&lt;/a&gt;에서 인물 설정과 시각적 방향을 함께 정리할 수 있습니다.&lt;/p&gt;

&lt;h2&gt;
  
  
  3. 이미지 프롬프트를 고정 요소와 변화 요소로 나누기
&lt;/h2&gt;

&lt;p&gt;고정 요소는 캐릭터를 알아보게 만드는 특징입니다. 예를 들면 헤어스타일, 눈 색, 얼굴 특징, 의상 실루엣, 핵심 색상입니다. 변화 요소는 포즈, 감정, 장소, 조명, 카메라 거리입니다.&lt;/p&gt;

&lt;p&gt;&lt;a href="https://ponys.ai/ai-image-generator" rel="noopener noreferrer"&gt;AI 이미지 생성 페이지&lt;/a&gt;에서 테스트할 때 한 번에 하나의 변화 요소만 수정하면 어떤 표현이 캐릭터 일관성에 영향을 주는지 파악하기 쉽습니다.&lt;/p&gt;

&lt;h2&gt;
  
  
  4. 영상은 짧은 단일 동작부터 시작하기
&lt;/h2&gt;

&lt;p&gt;처음부터 긴 장면을 만들기보다 눈 깜박임, 고개 돌리기, 미소, 손 흔들기처럼 하나의 동작을 먼저 검증하는 편이 좋습니다. 얼굴 변화와 특징 손실을 줄이면서 캐릭터다운 움직임을 찾을 수 있습니다.&lt;/p&gt;

&lt;p&gt;&lt;a href="https://ponys.ai/ai-video-generator" rel="noopener noreferrer"&gt;AI 영상 생성 페이지&lt;/a&gt;에서는 하나의 감정과 하나의 동작을 지정한 짧은 결과부터 비교해 볼 수 있습니다.&lt;/p&gt;

&lt;h2&gt;
  
  
  5. 다국어 캐릭터는 번역이 아니라 관계를 현지화하기
&lt;/h2&gt;

&lt;p&gt;한국어에서는 높임말, 호칭, 문장 끝맺음이 관계를 크게 바꿉니다. 영어 설정을 그대로 번역하기보다, 한국어에서 자연스러운 거리감과 감정 표현을 다시 설계해야 합니다.&lt;/p&gt;

&lt;h2&gt;
  
  
  게시 전 체크리스트
&lt;/h2&gt;

&lt;ul&gt;
&lt;li&gt;대화 말투가 캐릭터 관계와 맞는가&lt;/li&gt;
&lt;li&gt;이미지가 주요 외형 특징을 유지하는가&lt;/li&gt;
&lt;li&gt;영상 동작이 얼굴과 분위기를 바꾸지 않는가&lt;/li&gt;
&lt;li&gt;언어별 호칭과 경계가 일관적인가&lt;/li&gt;
&lt;/ul&gt;

&lt;p&gt;대화, 이미지, 영상, 다국어 표현이 같은 캐릭터 사양을 공유할 때 사용자는 여러 기능을 하나의 연속된 경험으로 받아들일 수 있습니다.&lt;/p&gt;

&lt;p&gt;&lt;em&gt;이 글은 Ponys.ai 팀이 정리한 제품 제작 노트입니다.&lt;/em&gt;&lt;/p&gt;

</description>
      <category>ai</category>
      <category>tutorial</category>
      <category>startup</category>
      <category>design</category>
    </item>
    <item>
      <title>從對話到圖像：設計一致 AI 角色體驗的五個實作步驟</title>
      <dc:creator>Joe Wu</dc:creator>
      <pubDate>Mon, 13 Jul 2026 09:40:53 +0000</pubDate>
      <link>https://dev.to/wujoe132/cong-dui-hua-dao-tu-xiang-she-ji-zhi-ai-jiao-se-ti-yan-de-wu-ge-shi-zuo-bu-zou-687</link>
      <guid>https://dev.to/wujoe132/cong-dui-hua-dao-tu-xiang-she-ji-zhi-ai-jiao-se-ti-yan-de-wu-ge-shi-zuo-bu-zou-687</guid>
      <description>&lt;p&gt;設計 AI 角色產品時，最常見的問題不是模型不夠強，而是角色在不同功能裡「不像同一個人」：聊天時是一種語氣，生成圖片後變成另一種形象，做成影片後又失去原本的性格。&lt;/p&gt;

&lt;p&gt;以下整理一套可以重複使用的角色設計流程，適合 AI 聊天、虛擬陪伴、角色圖片與短影片產品。&lt;/p&gt;

&lt;h2&gt;
  
  
  1. 先定義角色與使用者的關係
&lt;/h2&gt;

&lt;p&gt;不要只寫「溫柔、聰明、幽默」這類形容詞。更有效的做法是先回答：&lt;/p&gt;

&lt;ul&gt;
&lt;li&gt;角色如何稱呼使用者？&lt;/li&gt;
&lt;li&gt;初次見面和熟悉後的語氣有何不同？&lt;/li&gt;
&lt;li&gt;哪些事情會主動追問？&lt;/li&gt;
&lt;li&gt;哪些情境下應保持界線？&lt;/li&gt;
&lt;li&gt;長期互動後，什麼內容需要被記住？&lt;/li&gt;
&lt;/ul&gt;

&lt;p&gt;可先從 &lt;a href="https://ponys.ai/zh-CN/discover" rel="noopener noreferrer"&gt;Ponys.ai 中文角色探索頁&lt;/a&gt; 觀察不同角色的定位與呈現方式。&lt;/p&gt;

&lt;h2&gt;
  
  
  2. 把人設與視覺規格放在同一份文件
&lt;/h2&gt;

&lt;p&gt;角色名稱、背景故事、說話方式、服裝、髮色、表情和場景不應分散管理。建議建立一份角色規格，讓對話與視覺生成共用相同的基礎資料。&lt;/p&gt;

&lt;p&gt;若要從零開始，可以在 &lt;a href="https://ponys.ai/zh-CN/create" rel="noopener noreferrer"&gt;中文角色建立頁&lt;/a&gt; 同時整理人物設定與外觀方向。&lt;/p&gt;

&lt;h2&gt;
  
  
  3. 圖像提示詞要區分固定元素與變動元素
&lt;/h2&gt;

&lt;p&gt;固定元素用來維持角色辨識度，例如髮型、瞳色、服裝輪廓與主要配色；變動元素則包含姿勢、情緒、場景、光線和鏡頭距離。&lt;/p&gt;

&lt;p&gt;在 &lt;a href="https://ponys.ai/zh-CN/ai-image-generator" rel="noopener noreferrer"&gt;中文 AI 圖片生成頁&lt;/a&gt; 測試時，可一次只改一個變動元素，較容易找出影響一致性的原因。&lt;/p&gt;

&lt;h2&gt;
  
  
  4. 影片先做單一動作
&lt;/h2&gt;

&lt;p&gt;短影片不需要一開始就安排複雜情節。先測試眨眼、轉頭、微笑、揮手等單一動作，再逐步增加鏡頭和場景變化。這能降低臉部漂移與角色特徵失真的機率。&lt;/p&gt;

&lt;p&gt;可從 &lt;a href="https://ponys.ai/zh-CN/ai-video-generator" rel="noopener noreferrer"&gt;中文 AI 影片生成頁&lt;/a&gt; 建立短動作版本，再比較不同提示方式的穩定性。&lt;/p&gt;

&lt;h2&gt;
  
  
  5. 多語種不是逐字翻譯
&lt;/h2&gt;

&lt;p&gt;同一個角色在中文、日文、韓文和英文裡，稱呼、禮貌程度、句尾和情感表達都不同。真正的本地化應重新定義「關係距離」，而不是把英文人設逐句翻譯。&lt;/p&gt;

&lt;h2&gt;
  
  
  最後的檢查清單
&lt;/h2&gt;

&lt;p&gt;發布角色前，至少確認以下四點：&lt;/p&gt;

&lt;ul&gt;
&lt;li&gt;對話語氣是否符合角色定位&lt;/li&gt;
&lt;li&gt;圖片是否保留主要識別特徵&lt;/li&gt;
&lt;li&gt;影片動作是否自然且不改變人物&lt;/li&gt;
&lt;li&gt;不同語言中的稱呼與界線是否一致&lt;/li&gt;
&lt;/ul&gt;

&lt;p&gt;當聊天、圖片、影片和本地化共用同一套角色規格，AI 角色才會從一次性的生成內容，變成能持續互動的完整體驗。&lt;/p&gt;

&lt;p&gt;&lt;em&gt;本文為 Ponys.ai 團隊整理的產品實作筆記。&lt;/em&gt;&lt;/p&gt;

</description>
      <category>ai</category>
      <category>tutorial</category>
      <category>startup</category>
      <category>design</category>
    </item>
    <item>
      <title>AIキャラクター体験を設計する：会話・画像・動画を一つの流れにまとめる方法</title>
      <dc:creator>Joe Wu</dc:creator>
      <pubDate>Mon, 13 Jul 2026 09:38:46 +0000</pubDate>
      <link>https://dev.to/wujoe132/aikiyarakutati-yan-woshe-ji-suruhui-hua-hua-xiang-dong-hua-wo-tunoliu-renimatomerufang-fa-2cl6</link>
      <guid>https://dev.to/wujoe132/aikiyarakutati-yan-woshe-ji-suruhui-hua-hua-xiang-dong-hua-wo-tunoliu-renimatomerufang-fa-2cl6</guid>
      <description>&lt;p&gt;AIキャラクターを作るとき、会話だけを先に設計すると、画像や動画の印象が別物になりがちです。逆に、見た目だけを作り込んでも、会話の口調や関係性が定まっていなければ継続的な体験にはなりません。&lt;/p&gt;

&lt;p&gt;この記事では、Ponys.ai チームがプロダクトを作る中で整理した、AIキャラクター体験の基本的な設計手順を紹介します。&lt;/p&gt;

&lt;h2&gt;
  
  
  1. 最初に「役割」を一文で決める
&lt;/h2&gt;

&lt;p&gt;キャラクターの性格を形容詞だけで並べるのではなく、ユーザーとの関係を一文で定義します。&lt;/p&gt;

&lt;ul&gt;
&lt;li&gt;何を手伝うキャラクターなのか&lt;/li&gt;
&lt;li&gt;どのような距離感で話すのか&lt;/li&gt;
&lt;li&gt;どんな場面では慎重になるのか&lt;/li&gt;
&lt;li&gt;会話を重ねると何が変化するのか&lt;/li&gt;
&lt;/ul&gt;

&lt;p&gt;公開されているキャラクター例は &lt;a href="https://ponys.ai/ja-JP/discover" rel="noopener noreferrer"&gt;Ponys.ai のキャラクター探索ページ&lt;/a&gt; から確認できます。&lt;/p&gt;

&lt;h2&gt;
  
  
  2. 会話設定とビジュアル設定を分離しない
&lt;/h2&gt;

&lt;p&gt;名前、口調、価値観、服装、色、表情などを一つのキャラクター仕様として管理すると、会話と生成画像の一貫性を保ちやすくなります。&lt;/p&gt;

&lt;p&gt;新しいキャラクターを設計する場合は &lt;a href="https://ponys.ai/ja-JP/create" rel="noopener noreferrer"&gt;キャラクター作成ページ&lt;/a&gt; で、人物像と見た目を同じ流れの中で組み立てられます。&lt;/p&gt;

&lt;h2&gt;
  
  
  3. 画像は「一枚の完成品」ではなく状態の記録にする
&lt;/h2&gt;

&lt;p&gt;キャラクター画像はプロフィール画像だけではありません。会話の状況、場所、服装、感情を記録するビジュアルとして扱うと、体験に連続性が生まれます。&lt;/p&gt;

&lt;p&gt;&lt;a href="https://ponys.ai/ja-JP/ai-image-generator" rel="noopener noreferrer"&gt;AI画像生成ページ&lt;/a&gt; では、キャラクター設定を起点に複数の表現を試せます。生成時は次の要素を固定すると比較しやすくなります。&lt;/p&gt;

&lt;ul&gt;
&lt;li&gt;キャラクターの識別要素&lt;/li&gt;
&lt;li&gt;カメラ距離と構図&lt;/li&gt;
&lt;li&gt;光源と時間帯&lt;/li&gt;
&lt;li&gt;感情と視線&lt;/li&gt;
&lt;li&gt;背景の情報量&lt;/li&gt;
&lt;/ul&gt;

&lt;h2&gt;
  
  
  4. 動画は短い行動から始める
&lt;/h2&gt;

&lt;p&gt;最初から長い映像を狙うより、まばたき、振り向き、微笑む、髪が揺れるといった短い行動に分ける方が、キャラクターらしさを保ちやすくなります。&lt;/p&gt;

&lt;p&gt;試作には &lt;a href="https://ponys.ai/ja-JP/ai-video-generator" rel="noopener noreferrer"&gt;AI動画生成ページ&lt;/a&gt; を使い、まず一つの感情と一つの動作だけを指定するのがおすすめです。&lt;/p&gt;

&lt;h2&gt;
  
  
  5. 多言語化では翻訳より「会話の距離感」を確認する
&lt;/h2&gt;

&lt;p&gt;日本語では、敬語、呼び方、一人称、文末表現がキャラクター性を大きく左右します。英語の設定をそのまま翻訳するのではなく、日本語で自然な関係性になるよう再設計する必要があります。&lt;/p&gt;

&lt;p&gt;AIキャラクター体験の品質は、モデルの性能だけで決まりません。会話、画像、動画、多言語表現を同じキャラクター仕様から組み立てることで、初めて一貫した体験になります。&lt;/p&gt;

&lt;p&gt;&lt;em&gt;この記事は Ponys.ai チームによるプロダクトノートです。&lt;/em&gt;&lt;/p&gt;

</description>
      <category>tutorial</category>
      <category>ai</category>
      <category>startup</category>
      <category>buildinpublic</category>
    </item>
    <item>
      <title>Building AI character experiences with Ponys.ai</title>
      <dc:creator>Joe Wu</dc:creator>
      <pubDate>Mon, 13 Jul 2026 08:09:25 +0000</pubDate>
      <link>https://dev.to/wujoe132/building-ai-character-experiences-with-ponysai-15e4</link>
      <guid>https://dev.to/wujoe132/building-ai-character-experiences-with-ponysai-15e4</guid>
      <description>&lt;p&gt;Ponys.ai is a web platform for AI character chat, custom character creation, and character-based image generation.&lt;/p&gt;

&lt;p&gt;The product is organized around a few practical flows:&lt;/p&gt;

&lt;ul&gt;
&lt;li&gt;Discover AI characters and start conversations: &lt;a href="https://ponys.ai/discover" rel="noopener noreferrer"&gt;https://ponys.ai/discover&lt;/a&gt;
&lt;/li&gt;
&lt;li&gt;Create custom AI characters: &lt;a href="https://ponys.ai/create" rel="noopener noreferrer"&gt;https://ponys.ai/create&lt;/a&gt;
&lt;/li&gt;
&lt;li&gt;Use the AI character generator flow: &lt;a href="https://ponys.ai/ai-character-generator" rel="noopener noreferrer"&gt;https://ponys.ai/ai-character-generator&lt;/a&gt;
&lt;/li&gt;
&lt;li&gt;Generate character-based images: &lt;a href="https://ponys.ai/ai-image-generator" rel="noopener noreferrer"&gt;https://ponys.ai/ai-image-generator&lt;/a&gt;
&lt;/li&gt;
&lt;li&gt;Explore AI video generation: &lt;a href="https://ponys.ai/ai-video-generator" rel="noopener noreferrer"&gt;https://ponys.ai/ai-video-generator&lt;/a&gt;
&lt;/li&gt;
&lt;/ul&gt;

&lt;p&gt;The main site is here: &lt;a href="https://ponys.ai/" rel="noopener noreferrer"&gt;https://ponys.ai/&lt;/a&gt;&lt;/p&gt;

&lt;p&gt;From a product perspective, the interesting challenge is making character creation, chat, and generated media feel connected instead of split into separate tools. A character profile should support conversation, image prompts, discovery, and future creative workflows without forcing users to rebuild the same context each time.&lt;/p&gt;

&lt;p&gt;For developers and product builders studying AI companion products, Ponys.ai is a useful example of a consumer AI experience that combines discovery, creation, chat, and media generation in one place.&lt;/p&gt;

</description>
      <category>chatbots</category>
    </item>
  </channel>
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