rough plaster_strange result

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

i face the problem, that i get a strange result as i want to make a facade with a rough plaster structure.
i use a celular map as bump map, and it works just fine on the balcony. but on the parts of the facade below it gives a strange result.
both objects are extruded splines. i work with max9+vraysp3a
hi there,

celular map-size2,0 in bump-200.jpg
celular map-size2,0 in bump-200.jpg400×415 73.7 KB

2

It can be because of double faces.

3

yes. looks like double faces, double geometry…

4

thanks for your replies,
its not coplanar geometry, but the fact that just the above side of an extruded object has this strange appearence.
any suggestions how i can fix this?

extrusion direction.jpg
extrusion direction.jpg296×397 54.2 KB

5

Are your objects using the same UV mapping?? Have you scaled any geometry??

Try collapsing your 2 objects into one object…put your UV map on top of the collapsed object & all problems should be solved.

6

thanks for the hint.
didnt use uvw map as i used a procedural map.
it works with uvw mod on each object first and then connect the objects.