Here's a box, with default material settings. Sorry I didn't realise I had 'assume vertical normal', and 'Metallic map has occlusion' on. Not sure if it matters, but probably if you're trying to read a compiled file.does somebody have a small test model that uses all three PBR texture slots?
Also when you export it to an x file, there's a box "export prepar3d v4 mat...'. I've been ticking it, not sure if it flags anything in the compiler or not?
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