Getting weird render errors on (some) purchased FBX models

[heynewt]

If you look at the attached images, I'm getting these weird render issues with purchased FBX models.  I used to get this when I worked in MODO, and I would fix it by deleting the embedded property "FBX Normals".   I assume this is the same embedded FBX Normals issue in MAX, but I don't know how to fix it there.  Any advice?

[raiden_xavier]

Hi @heynewt,

Thanks for sharing your issue with us.

1. Edit Poly modifier.
2. Selection mode: Polygon.
3. Select the object.
4. Check that all faces are bright red. Are any a darker red? (facing inward).
5. You can go to Edit Polygon > Edit Polygons Parameters > 'Flip' on the darker faces.

Apologies if I misunderstood.

We look forward to hearing from you.

Regards,

[heynewt · Accepted solution]

Thanks for the reply.  Good suggestion.  There were derfinitely flipped polys.  I fixed those (tedious), and that seems to have fixed the OpenGL "black" polys.  But there are still weird render issues. 

I exported and brought the model into Modo, where I'm more comfortable analyzing.  It's a mess.  Co-planar polys, duplicate vertices, just everything wrong with it.  Bottom line is, I bought a cheap, crappy model, I think.  Lesson learned.

Thanks for the poly flip advice though!