Hi Karsten, thanks for posting the file. So yes your test2.obj file doesn't adhere to the spec you linked to above - according to the spec a "v" line specifying a geometric vertex can have x y z and optionally a w value for curves.
Your test2.obj file has x y z r g b values for each vertex, but that isn't mentioned anywhere in the spec.
It seems to be a variant that's used by several programs though.
- Michael
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