I have made with some help a terrain with a snow shader.
So I used material nodes to create a snow shader to color only sheer rock walls of the terrain with ground color and the other part with snow color.
Now I want to make this possible in cycles, but I have some problems to find the right solutions. To realize the snow shader, I have a sun light above the terrain which light goes straight down and is grouped. In my material node I have a material node which used the “Light Group” option with the sun light as the value and exclusive enabled.
Here is my material from blender internal:
Ok I think the two materials node for ground and snow can I realize with two Diffuse Shader combined with a mix shader, but I have some problems with the LightGroup and to convert this part of the material. It’s the upper part with the ColorRamp.
I hope someone can help me and this is the right place to ask this kind of question. When some points are not clear I can try to explain it with more detail or attach some pictures with the options.