Normal map direction in .GLB / Adobe Aero

Discussion started by yaschan

Hey,
I have noticed that when opening .glb in Aero the normal maps are always inverted, bumps become cavities. I am using Substance Painter to export the files.

However if I preview the .glb in the web viewer for example, the normal maps are rendered correctly.

https://gltf-viewer.donmccurdy.com/

Could someone tell what the specification is, should the normal maps be directX or openGL format? Khronos group article doesnt seem to mention it https://www.khronos.org/gltf/

I would really appreciate any advice you may have.

thanks,

Jaakko

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