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I've a problem with FBX textures import. For example a minimun U(V) coordinate is -0.04 and a maximim one is 0.96. But what U(V) range is really used for mapping? Variants
[0..1] (most probably)
[-1..1]
[-0.04..0.96] (it's unlikely)
Same question can be re-formulated as: what position in UV space does correspond to image center? (0.5, 0.5) or (0, 0) or (0.48, 0.48)? The texture translation is (0, 0), can't help
>> Read my response here. You're making bad assumptions about how UVs work.
If I understood you well, everything outside [0..1] is tiled/repeated. I've read many models from different 3d apps - it's not always so. The range [0..1] is just using more often, but not near always. UV is just а "space" that can hold any data as they are wriiten. For example many apps do copy model coordinates as UV(s). The range [-0.5..0.5] is also enough popular practice. Noone promised they are from 0 to 1
Texture coordinates can have any value. It depending on the clamping/wrapping values for interpretation. To sample an image, texture coordinates need to range from [0.0, 1.0). Note that 1.0 is exclusive, meaning that 1.0 maps to the same texel as 0.0. Depending on the wrapping and clamping values, texture coordinate values outsize the [0.0, 1.0) range are mapped back into this range. So texels are located in [0.0, 1.0), texture coordinates can be any floating point value and the texture mapping controls can remap the texture coordinate back into texel space.
