Weird black stuff on my render

Started by elmoheadbutt, December 14, 2010, 04:16:14 am

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elmoheadbutt

Hi, I'm a new member and also a new Terragen 2 user. I played with Terragen WAYYY back when it was a very simple program, but man, Terragen 2 is so different! I usually do interior renderings, and there's not much rocks and clouds in rooms :D so I'm having some troubles with this program.

One problem that I have is in regards to this render. I'm not sure what I did to the fake stone shader there, but if you look closely at the ice-looking stone closest to you, there is this black stuff at the bottom. Is this a common problem? Am I doing something uber noob here?

Thanks for the help in advance.

Henry Blewer

That is whre the two different shaders are meeting. On the non-blue/ice surface layers effects tab, turn on Displacement intersection. See how the area looks in a crop render. If it's looking good great. Other wise try changing the values. You may need to adjust the smoothing also.
The ice looks very good by the way.
http://flickr.com/photos/njeneb/
Forget Tuesday; It's just Monday spelled with a T

Tangled-Universe

I'm not sure if displacement intersection would work, in fact, I think it's not a good idea at all.
The fake stones shader is a fancy displacement function and at the point where the surface is being protruded to create a stone the displacement is pretty extreme. My suggestion is that you would need to increase the displacement tolerance in the planet node.

Henry Blewer

That does sound like better advise. I can't recall ever having this occur to me in a scene. But I tend to use overlapping surface layers; the slope settings 'build' onto each other. Maybe that is why I don't get this.
http://flickr.com/photos/njeneb/
Forget Tuesday; It's just Monday spelled with a T

elmoheadbutt

Thanks guys. I shall try it when I'm done with another render.