displacement issue

Forums Houdini Indie and Apprentice displacement issue

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roughsporty: Member; 191 posts; Joined: Aug. 2008; Offline

April 30, 2010 5:29 p.m.

For my model I used the reflective displacement preset material and used a displacement map for the look.

In the render I get fine grid lines as you can see in the picture.

So why is that?

Attachments:
Displace.jpg (84.0 KB)


roughsporty: Member; 191 posts; Joined: Aug. 2008; Offline

May 1, 2010 6:14 a.m.

the mesh is really dense and it looks like the fine grid lines have the same proportions as my faces, but I have no idea how to avoid that


ultraharmonizer: Member; 63 posts; Joined: Sept. 2009; Offline

May 1, 2010 1:47 p.m.

How does it look when rendering with no displacement? If you're using a displacement map, maybe those grids are within your map…. or your map is being tiled over your geo and it's borders aren't seamless.


roughsporty: Member; 191 posts; Joined: Aug. 2008; Offline

May 2, 2010 2:11 p.m.

Without displacement, it looks like normal. The map is seamless and there are also no grids in the map


ultraharmonizer: Member; 63 posts; Joined: Sept. 2009; Offline

May 2, 2010 10:03 p.m.

It could be a UV mapping issue. What sort of UV mapping are you using? If your UV mapping isn't seamless, your displacement map may be scattered across your surface… accentuating the grid faces.


roughsporty: Member; 191 posts; Joined: Aug. 2008; Offline

May 3, 2010 1:24 a.m.

i'm using a simple uv projection but i think I have found out the problem.

I have increased the shading quality from 1 to 3 and voilá the grid lines are gone away.

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