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The crystal and crack fuctions were applied directly to the color map. Since I'm using a negative displacement, I had to place an 'opposite' filter between the color map and the cracks. If I use just an image map on a displacement, there's noticable stretching on certain facets of the displacement, but I like adding one to the other procedural functions. It drives a subtle color variation.

In the image above, eonite topped his rock off with a sprinkle of tree to great effect...

In this experiment, I'm combining the displaced rock with a scree like material........

Mixing a displaced material has it's own dynamics worth exploring......

That looks cool!
I especially like the rock in the background with a kind of layering.Really nice.
Indeed getting some subtle color changes can be beneficial.

Question: What`s the benefit of using a negative value for displacement (besides that the vaklues are inverted)
2nd question: The small rocks in the foreground which jump out, are these generated by the function or is this a separate ecosystem?

http://www.eonmusic.ch http://www.artmatica.ch