- Mon Sep 20, 2010 6:52 am
#330813
If you model scratches as the places where a surface intersects random 3D space-partitioning cutting planes then it might be possible to make scratches on metal that seem to make a halo around highlights.
Fill space with randomly located point/normals -- those are planes. For each surface point rendered, see if it lies close to within a plane. Then it is a 'scratch.' Light accordingly.
Advantage: texture is not 2D mapped. No UVs or pinching at poles.
(don't know if this would work)
Fill space with randomly located point/normals -- those are planes. For each surface point rendered, see if it lies close to within a plane. Then it is a 'scratch.' Light accordingly.
Advantage: texture is not 2D mapped. No UVs or pinching at poles.
(don't know if this would work)

- By Jochen Haug