I modeled a logo I tried to render with luxrender.
When I select a built in material like metal-silver, the rendering is fine whereas when I use a lbm material like the one featured on page http://www.luxrender.net/lrmdb/en/material/view/77 I get some stripes like on the ones showed on the attached screenshot.
Could anyone tell me how to get rid of these stripes?
I already tried to flip and recalculate normals (CTRL+N) but it didn’t change anything…
Thanks in advance,