nearly solved UV channels and ambient texture.

[SvenFrankson]

Hi everyone,

(note : At first I thought it was a bug, now with a Playground I think it's a feature I don't fully understand...)

Here is a case I'm facing, waiting for some nice expert to enlighten me...

Use case

- A mesh is generated with UVs (for diffuse Texture) and UVs1 (for a default ambient texture).

- On a user action, another ambient texture is computed, based on UVs2 channel, and applied.

- The new ambient texture fails to use UVs2.

(note : I'd like to have all the UVs (UVs, UVs1 and UVs2) generated at the same time, and not on user action)

(note : A solution for my specific case would be to exchange UVs1 and UVs2 when assigning the new ambient texture)

 

Playground : https://www.babylonjs-playground.com/#6L74SN#1

Is there a way to use UVs2 for the ambient texture here ?

Alternatively, is there a use for all these UV channels in the StandardMaterial (or PBRMaterial ?) ? Some rules like "UVs or UVs1 for diffuse, UVs2 for LightMap, UVs3 for displacement..." ?

Thanks a lot and have a nice day !

 

[GameMonetize]

Hello!

not a bug per se but more a limitation: StdMaterial and PBRMaterial can only use 2 textures coordinates (uv0 and uv1).

Here is the code for your record:

https://github.com/BabylonJS/Babylon.js/blob/master/src/Shaders/default.vertex.fx#L138