As we mentioned in a previous article, Draco can be loaded in Three.js to compress 3D models. It mainly handles geometric data such as vertices, faces, and normals, helping reduce pressure on model transmission and storage.
However, in real-world projects, I’ve found that even after geometry has been compressed, many scenes still don’t feel lightweight enough. Some models may not even have a high polygon count, yet they still load slowly. After digging into the issue, the real bottleneck often turns out to be the textures.
The most common situation is this:
textures are high-resolution and there are too many of them.
When maps like base color, normal, roughness, metallic, and AO are all included, GPU memory usage can rise significantly. That’s why, in addition to Draco, I now usually pay attention to another important optimization method: KTX2 texture compression.
How does Translight 3D handle KTX2 texture compression?
Common image formats such as PNG and JPG can reduce file size to some extent, but during rendering they still need to be decoded and uploaded, so GPU memory usage is far from ideal.
KTX2 is not simply about “making images smaller.”
Instead, it makes textures lighter throughout the entire pipeline, including transfer, decoding, uploading, and rendering.
But in actual projects, maps like normals, roughness, metallic, and AO are often the easiest assets to pile up in size. And it’s simply not realistic to inspect and optimize every texture one by one—that would make maintenance far too costly.
This is where Translight 3D becomes valuable. It integrates texture compression into a unified workflow, instead of forcing me to switch to separate tools just to process textures. From a front-end developer’s perspective, this is genuinely important. With just a few simple steps, the whole process can be completed easily.
1. Select the model file
Add the files that need lightweight processing into the software.
2. KTX2 texture compression
The software will automatically scan the assets.
Once the scan is complete, simply check the desired options and start the lightweight optimization process.
3. Start optimization
The software will automatically perform model lightweight processing, including:
object count optimization
texture optimization
KTX2 texture compression
4. Preview
Click Preview to see the optimized result after processing.
In summary
When working on Three.js projects, I usually don’t focus only on geometry. Instead, I look at geometry compression and texture compression together. Because what really affects the user experience is rarely a single factor—it’s whether the entire asset pipeline is lightweight enough.
For projects that need to balance loading speed, visual quality, and mobile stability, having a practical optimization tool can often make the whole process much more efficient.
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