Normal map texture compression problems

textures

#1

Sketchfab does quite a lot of processing and compression of textures in order to reduce download times and improve rendering performance.

However, we know that lossy JPEG compression can sometimes cause issues, particularly for normal maps. So, we have implemented an option to force using lossless PNG compression for normal maps.

The huge majority of normal maps are not visually affected by compression. Therefore, this lossless option can only be enabled by Sketchfab Staff, and must be enabled for individual models on a case-by-case basis.

A good way to test if your textures are affected is to compare the 3D Settings rendering (always original / lossless textures) to the regular viewer rendering (always compressed textures).

If you think your model is affected by normal map compression artifacts, contact us with the model information and we can reprocess the normal map(s) for you.


Normalmaps compression artifacts
Normal Maps Corrupt Between Editor Scene and Public Scene
Different bump quality in viewer and 3d settings editor
Good image quality inside editor and bad image compression inside viewer
Artifacts on a model (texture compression problem)
About texture compression issue ~
Issues with texture compression
Texture quality degredation between 3d settings and regular view
Texture quality degradation from sketchfab webviewer to sketchfab editor viewer
Shiny Materials Gold
Very low quality textures being displayed intermittently
pinned #2

closed #3