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Importing OBJ files in blender gives positions that don't (textually) match the .obj file. That is to say, a vertex that has position (1,2,3) is imported with coordinates (1,-3,2) (I think, this is what I want to check).

As far as I can tell, this transform the importer applies is (x,y,z) -> (x,-z, y). Is this correct?

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When you import an obj there are some transform setting on the right side of the file picker:

File picker showing obj transform settings

As you can see, the default are '-Z forward' and 'Y up'. Any of these can be changed, but the default does amount to (x,y,z) -> (x,-z, y), yes.

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  • $\begingroup$ I didn't notice that. Thanks $\endgroup$
    – Lucas
    Oct 22, 2021 at 2:45

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