Faceted bump render

[Richy]

Hi, this is simple sphere with bump map, and i can't remember how to solve this.

Thanks!

[ecximer]

add mesh smoothing iterations.

[Richy]

Subdivided mesh, but got just smaller facets.

[Captain Obvious]

There is no real solution for it. You'll have to reduce the bump strength and increase the mesh smoothing.

[crazyman]

Show mat settings. Are you sure you did not apply normal map as bitmap, or opposite bump bitmap as normals?

[Richy]

Show mat settings. Are you sure you did not apply normal map as bitmap, or opposite bump bitmap as normals?

I just plugged procedural noise into bump slot.

[Captain Obvious]

This isn't a bug or anything. It's called the terminator problem, and you can read some about it in this PDF: http://geekshavefeelings.com/x/wp-content/uploads/2010/03/Its-Really-Not-a-Rendering-Bug-You-see....pdf

Basically, what's happening here is that the strong bump map is increasing the effect. You need to A) reduce the strength of the bump and B) increase the tessellation of your sphere. Eventually it won't be noticeable any more.

[crazyman]

OR just use displacement instead bump

[Richy]

Thanks!

[Captain Obvious]

OR just use displacement instead bump

Yes, that works too because it actually generates additional polygons, instead of just changing the normals. But you can still get this problem with displacements, if your displacement subdivision rate is too coarse.