Is this standard OBJ/MTL spec?

by The Obscure Question   Last Updated May 15, 2018 20:15 PM

I have an OBJ mesh with UV coordinates ranging from 0 to 2 along both U, V dimensions. I have four textures associated with this mesh.

The expected behavior is that the offset of the UV coordinates determines the specific texture to use. For example, the UV coordinate (0.5, 0.5) refers to a coordinate in the first texture, (0.5, 1.5) is a UV coordinate in the second texture, (1.5, 0.5) is a coordinate in the third texture, and (1.5, 1.5) is a coordinate in the last texture.

However, I don't know if this is standard behavior, as many of the programs that I have tried using only texture UVs in the range (0, 0) < (u, v) < (1, 1), i.e. only the first texture is applied.



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