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Support automatic packing of MRAO maps and height into normal. This is for compatibility with the PBR shader.
The following rules should be adhered to:
- ambient occlusion:
_ao.xxx
or_ambientocclusion.xxx
- metalness:
_metal.xxx
or_m.xxx
- roughness:
_r.xxx
or_roughness.xxx
- color: No postfix or
_c.xxx
or_color.xxx
or_albedo.xxx
- height:
_h.xxx
or_height.xxx
- normal:
_n.xxx
or_normal.xxx
Each file in the directory needs to be processed. If the file matches any of the color map specification (_c, _color, no postfix or _albedo), then vtex2 will determine the "stem" file name. It will then figure out the other map components for packing.
The implementation should probably defer actual processing until it's actually read all of the directory's contents. Upon encountering the base name, it should create a new "texture set". Anything that matches an existing texture sets stem will then be added to the texture set. At the end of processing, all files will be packed.
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