Chaos Corona Forum
Chaos Corona for Cinema 4D => [C4D] General Discussion => Topic started by: gubbfet on 2020-08-07, 17:27:35
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Hi,
I have been trying all I can to get rid of this problem. It is small random squares on the material. Don't know if its corona or C4D related.
Anyone seen this before?
Cheers, Karl
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Couldn't say without knowing what the material set up is (also C4D version, Corona version, OS, would help too).
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I have seen such squares in my renders too. In my case, 2.5d displacement caused the issue.
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Good call! That could be the case - long thin triangles in the mesh can cause 2.5D displacement to have some issues, if there is displacement in the material, try disabling 2.5D displace and see what happens.
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To me it looks like simple UV problem. I think your sidewall and tread UVs are overlapping and you see sidewall texture where it shouldn't bee.
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HI guys,
So I have tried a bit further with the suggestions you had and now it looks like it is from the Bump it comes from and specific the Triplanar shader.
see with the Triplanar and without.
Any suggestion why it behaves like this?
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Can you show what texture you are mapping on the tyre with triplanar?
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Hi,
Thanks for the help and it seems that it was bad UW. I took another Tyre to solve the problem :)
/K
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Well, you can easily map that "bad" tyre as well. Just select sidewall polygons and apply planar UV map, then select tread polygons and apply cylindrical UV map. You'd also likely will need to apply different materials and/or textures to sidewal and to tread. C4D terminology might be slightly different, but it shouldn't be hard to figure out this.
P.S. don't throw away the tyre if it's still good - that's bad for enviroment :]