Why does my model render shady / half-black? 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. 



I would appreciate any help!

P.S. Source Blend file: https://nofile.io/f/q1ArSbeAva0/Shady_Car.7z
You have custom split normals data on your model, You should to delete it, then blender will recalculate normals properly.


Removing custom norlals in Geometry data section:





Then select all faces and press Ctrl+N