Substance Painter ignores .glb mesh scale on import

[krazyjakee]

Hi all, I know you guys aren't Adobe but since I'm struggling to find any resources on this issue, I thought you or somebody else would like to read about it.

Problem

When importing a .glb file into Adobe Substance Painter, the mesh scale is ignored. Painter imports the raw geometry as if no transforms have been applied, so a model that is meters tall in Blender/Unity is treated as only a few centimeters in Painter.

This makes texturing impractical: materials, tri‑planar projections, and detail scales are all calculated on the assumption that the model is tiny.

After a lot of trial and error, I discovered this doesn’t happen with .fbx or .obj—only .glb. Those formats appear to bake the transforms correctly, while .glb/.gltf keeps transforms separate (consistent with the format spec). Painter currently doesn’t honor those.

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How to Reproduce

1. Create a mesh in Blender (e.g. a tall cliff wall ~5m high).
2. Apply no transforms (scale is not applied, object scale is 100).
3. Export as .glb.
4. Import into Painter.
5. Observe: mesh is tiny compared to expectations; texturing tools treat it as centimeter scale.

Repeat with .fbx - scale looks correct.

Would love confirmation from others if they’ve hit this - and whether this is an intended limitation or a bug.