I have been building slide decks with AI generated images for about a year now. Product pitches, internal updates, a couple of conference talks. Some of those images made the deck better. A few made it look like a screensaver from 2009. The difference rarely came down to how clever my prompt was. It came down to where I put the image and what job I asked it to do.
If you want to try the same workflow, I run most of my attempts through a best AI image generator style tool, the free kind, because a deck usually needs twenty bad attempts before one usable frame and pay per image adds up fast. The rest of this post is what I learned about which slides deserve an image and which ones should stay plain.
Where AI images genuinely help a deck
Three spots have worked for me over and over. Section dividers, where an abstract image sets a mood while people read the section title. Conceptual metaphors, the slides where you explain a handoff between systems or an idea sitting in a queue, things that are hard to photograph without drifting into stock photo cheese. And textured backgrounds, a quiet generated surface with heavy text on top, which reads as design rather than clip art.
What these have in common is that the image carries atmosphere, not information. Nobody needs to study it. It supports the point you are making out loud.
Where generated images fall flat
Close up faces are the first trap. Current models still get eyes and teeth slightly wrong, and on a projector at 10 feet tall that wrongness is all anyone sees. Anything with text inside the image is the second trap, because the letters come out scrambled and the scrambling sits next to your careful headline. The third is fake data. Never generate a chart. A made up graph in a business deck is worse than no graph.
Photorealistic office scenes also tend to read as generic stock, which defeats the point of making something custom.
Keeping a consistent look across slides
A deck falls apart when slide 4 looks like a watercolor and slide 9 looks like a render from a game engine. Two habits fix this. First, reuse the same style block at the end of every prompt, something like "muted 3D render, soft studio light, pale paper background". Second, generate every image in the deck with the same tool, since each model has a face you can spot once you have seen enough of its output.
I also lock a rough palette before generating. If the deck template is navy and sand, those words go into the prompt, and images that come back clashing get thrown away rather than fixed later in an editor.
Sizing for the 16:9 canvas
Generate at the aspect ratio you need instead of cropping later. A square image squeezed into a wide slide leaves dead space on both sides, and a stretched one looks broken from the back row. Upscale the keepers, compress them, and keep an eye on total deck size. I have watched a 90 MB file bounce from an email attachment because nobody compressed the hero images.
A workflow that survives a deadline
Write the outline first and mark which slides actually need an image. In a 20 slide deck that is usually five or six, fewer than instinct suggests. Then batch the prompts section by section, generate five options per slot, pick one, and give every keeper the same crop and treatment in one pass. Doing treatment last, all at once, is what makes the deck feel like one document instead of a collage.
FAQ
Can I use AI images in a client presentation?
Usually yes, but check the license of the specific generator you used before the deck ships. Keep a note of which tool produced which image so you can answer the question later without guessing.
How many AI images should one deck have?
Fewer than you think. Five strong images in twenty slides looks intentional. Twelve looks like a demo of the generator. The tool should be invisible.
Why does the text inside my generated images look wrong?
Image models do not spell reliably. Keep words out of the image and put them on the slide as real text instead. This is also better for anyone using a screen reader.
Do audiences notice that images are generated?
They notice inconsistency before they notice generation. Matched style across slides reads as professional even when every frame is obviously synthetic.
Conclusion
AI generated images earn their place in a deck when they carry mood rather than facts. Use them for dividers, metaphors, and backgrounds. Keep faces, text, and charts out of the frame. Generate everything with one tool under one style prompt, treat the keepers in a single pass, and compress before you send. If you want a place to burn through attempts without watching credits, a free AI image generator is a reasonable starting point for your next deck.
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