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Ok, I Agree

AO map flipped after GLTF export

This topic has 3 replies, 3 voices, and was last updated 3 years, 10 months ago by kdv.

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2022-11-13 at 6:31 pm #57289
radek
Customer
Hi.

Verge3D 4.1.1
Blender 3.3.0

I have a 3D model where the AO map is in a different UV space.

This model is correctly loaded into the scene

But after exporting the scene, the AO map is vertically flipped
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2022-11-14 at 1:54 am #57297

kdv
Participant

that’s because v3d.js creates new textures with flipY = true by default. Why? Maybe it’s a kind of a joke )))

GLTF and USDZ exporters issue with AO map

Puzzles and JS coding. Fast and expensive.

If you don’t see the meaning in something it primarily means that you just don’t see it but not the absence of the meaning at all.

2022-11-14 at 11:41 am #57324

Yuri Kovelenov
Staff

Indeed, glTF uses the DirectX format for textures while WebGL follows OpenGL’s. We’ll try to fix this for the next update which we planned for tomorrow.

Chief 3D Verger | LinkedIn | X

2022-11-14 at 2:46 pm #57325

kdv
Participant

Changing this.flipY from true to false in the class Texture completely removes the propblem with the occlusion/roughness/metallic texture which is generated by the V3D GLTF exporter.

Puzzles and JS coding. Fast and expensive.

If you don’t see the meaning in something it primarily means that you just don’t see it but not the absence of the meaning at all.
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