Displacement and Objects with sharp edges.

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

Hi,

i have rendered a few objects with V-Ray displacement (latest demo) and as long as i have a meshsmooth modifier applied it looks good.

Now i want to do some hieroglyphs on a object that has sharp corners (90 degrees).

Im unable to get a clean result.
I have the edges chamfered a bit already but the edges look not clean.
They look like they have small dents or dark pixels on it.

I tried 2d and 3d displacement and all possible options, what can i do?

Like all my diplacement maps i have done them in Z-Brush (i know that i have to flip the map for max) and i have tested with GUV and AUV mapping.

I have also done a test with the pixolator test file (the sword) from the zbrush forum. The displacement only looks good when you use a meshsmooth modifier on the base object. :frowning:
If you don´t use meshsmooth the object looks exploded ( no matter if keep continuity is checked or not).

Is there some magic trick to get a clean result from V-Ray displacement?

2

displacement magnifies ANY uv seams. make sure your uvs are straight. a pic showing your problems might be helpful.

3

The GUV or AUV mapping from zbrush works very good with other renderer (none max).

Have send a OBJ file and the Map to a friend who uses XSI and he had no such strange effects with MR.

I will look if i can up a picture that shows the effect.

4

This is what V-Ray renders with a 2048x2048 pixel displacement map.

A cut out part from a bigger rendered image.

The edges should not be displaced at all and what are these strange artefacts?

No GI enabled.
Only a standard material and a pointlight with no shadows.

Im using V-Ray for only 10 hours, so it´s more then possible that im doing something wrong. Please help. :slight_smile:

5

Why is adding a mesh smooth modifier a problem?

6

Because i want sharp edges as i wrote.

And when i add a meshsmooth to it but use 0 iterations it changes nothing.

I already added the chamfered edges because i saw a posting that this will help.

All i want is a simple object that has sharp edges and nice displacement, without thinking about workarounds and changing the geometry to make it work.
Seems to be impossible with MAX renderer at this time?

7

Ok forget it. I found the error that creates the artifacts. :sweat_smile:
Had nothing to do with V-Rray. Sorry.

But still have the problems to get rid of seams without using meshsmooth.