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I imported a Wavefront model (OBJ + MTL) and tried to render it using Cycles. Unfortunately, model renders shady / half-black. It seems that only one wheel looks as expected. I can't figure out what causes this behavior.

enter image description here

I would appreciate any help!

P.S. Source Blend file: https://nofile.io/f/q1ArSbeAva0/Shady_Car.7z

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  • $\begingroup$ Hard to see the geometry from just the render. Do the other tires have materials properly assigned? Also check that face normals point outwards with CTRL-N. $\endgroup$ – kheetor May 3 '18 at 12:36
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You have custom split normals data on your model, You should to delete it, then blender will recalculate normals properly.

  1. Removing custom norlals in Geometry data section:

enter image description here

  1. Then select all faces and press Ctrl+N
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  • $\begingroup$ It's a little bit offtopic, but still: what's the equivalent of custom split normals data in 3Ds Max? $\endgroup$ – SagRU May 4 '18 at 5:08

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