Banding problem

[manalokos]

Hello

I am having some banding problems on these surfaces, first I thought that it was due to a bumpmap tiling, but after changing the bumpmap the lines remained on the same place, so I wonder could it be caused by the surface being completely parallel to the XY plane and the camera perfectly perpendicular?

Or is it a rayepsilon issue?

Thanks
Best regards
Filipe

[FooZe]

Hi Manalokos,

It doesn't look typical of a ray epsilon issue (although i could be wrong!).
I would first double check the deep channel kernel, geometric normals, shading normals, wireframe, interpolated vertex normals etc to see if anything looks off/strange.

Then i would start looking at lighting and materials. The dirt map can do things like this on the intersection of geometry if the sharpness/details setting is too high.

As a last resort i would make sure it's not some kind of reflection causing a lighting pattern on the wall (not likely but if nothing else is to blame, take a look).

hope you get it sorted...

Thanks
Chris

[manalokos]

Thanks Fooze

I've tried, there is nothing wrong with the normals.
I also removed the reflections on the wall using only a diffuse material, the banding persists.
Could it be caused by the camera's near clip? I am "photographing" this scene from outsite the room walls and have some 2 meters of nearclip...

It is a difficult case to troubleshoot as to be able to see the artifact I need some 3 hours of rendering...

Best regards
Filipe