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Kerkythea Rendering System • View topic - A material which doesn't catch the light...
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A material which doesn't catch the light...

Moderator: ModeratorGroup

<<

Yvanou

KT-Senior

Posts: 51

Joined: Tue Jun 22, 2010 9:12 am

Post Sat Sep 18, 2010 9:04 am

A material which doesn't catch the light...

Hi everybody!!

I tried to enlight a wall made of brick and stone but the stone doesn't catch the light very well...

See the file attached...
Attachments
Mur.kzx
The KT file
(7.22 KiB) Downloaded 234 times
Mur 1.jpg
The result
<<

Fletch

KT-Team
KT-Team

Posts: 8564

Joined: Fri Oct 27, 2006 2:38 am

Location: Milwaukee, WI USA

Post Sat Sep 18, 2010 9:41 am

you must create a good bump map for the stone.

paint on a new layer in your image editor program on top of the stone image.

paint white where you want the highest bumps, 50% gray = no bump, black=lowest valley into the surface for the bump map.


<<

Yvanou

KT-Senior

Posts: 51

Joined: Tue Jun 22, 2010 9:12 am

Post Sat Sep 18, 2010 9:50 am

Ok thanx.

But I already used a Normal map ? Why doesnt it work ?
<<

Fletch

KT-Team
KT-Team

Posts: 8564

Joined: Fri Oct 27, 2006 2:38 am

Location: Milwaukee, WI USA

Post Sat Sep 18, 2010 10:24 am

normal map is fine, but if it's a bad normal map, then not.
sorry I have no time now for looking at the scene... but if you are not using any specular component in your stone material, there will be no bump with a normal or bump map... so you have to have some IOR greater than 1.0 and specular color assigned... or better a specular map specially made for your image. I often use my bump map in the specular slot, but it depends on the material being made, as often that does not work.
I find it works well with ceramic tile and brick.



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