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Kerkythea Rendering System • View topic - A material which doesn't catch the light...
Page 1 of 1

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

PostPosted: Sat Sep 18, 2010 9:04 am
by Yvanou
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...

PostPosted: Sat Sep 18, 2010 9:41 am
by Fletch
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.

PostPosted: Sat Sep 18, 2010 9:50 am
by Yvanou
Ok thanx.

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

PostPosted: Sat Sep 18, 2010 10:24 am
by Fletch
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.