black artifacts

[kalashnikov]

Hi to everyone again,
I still work on my car reality and now when I get close enough to what I need, I get weird black artifacts in some spots on reflections. Here is pic:


When I set smooth flat on this places, artifacts disappears, but then also reflection is gone. Is this something with my model or with material? For material I use shiny car paint.

[burnin]

Nothing is wrong, just lack of knowledge.
These shading 'artifacts' are caused by normals.
To 'correct', either:
- 'correct' vertex normals
- or set split edges
- or add edge loops/add more geo/ subdivide

[kalashnikov]

Thanks, edge split modifier fixed it all!

[JuhaW]

Egde split doubles your edges without angle definition, try object shading smooth and autosmooth angle around 30-60 degrees.