please help me: "invalid bump normal" error without any reason

V-Ray V-Ray for 3ds Max General
1

Hi,
I get this error message “returned and invalid bump normal” on one texture.
I have:
- uvw maps on all objects with this texture

I have the colored version of the same texture on diffuse but error message is displayed only for the bump.

my scene is at origin but it is rather a big scene (of one site with man buildings).
but 0,0 origin is right at the center.

pls help.

2

error message disappears when I disable the bump map.
it is strange.
colored version of same map with same map channel is diffuse slot.
diffuse is fine and bump has problem.

3

typically its not a problem from what I recall. You may want to revisit your normals on the object, and check its tesselation (for bad topology).

4

thanks for answer:) _ok I will try that.
I havent ever did this before.

5

I have a case where this happens with the VRayEdgesTex used as a bump map, but I have to look into the precise reason.

Best regards,
Vlado

6

This may be the one I sent you Vlado. I fixed it later by simply hitting the retriangulate button in edit poly, although i’m unsure of how this would have fixed it.

7

Actually the geometry is very simple on this object.
Only 4 polygons.

Think of a trapezoid polygon.
I inseted this polygon. and then deleted middle polygon.
so only 4 poly. and very basic.
but it is a very very large object. this can be the problem?

vlado: there are no vrayedge texture.

8

Does it have proper UVW coordinates?

Best regards,
Vlado

9

yes it has.

now already solved the problem. I deleted that object.
I re-modeled it. exactly the same way. exactly same dimension. same number of poly. all is same.
and now it is fine.
I didnt understand what causes problem.
but all is fine now.

10

I can report the same problem, but rebuild the material soved it w/o need to remodel.. some times even convert bump texture from png or bmp to jpg solved it too.

11

yes my texture was png too.