Because I am not brilliant, how does one merge this to a terrain and limit altitude. I have already tried a power fractal terrain and a merge shader, limiting altitude on all surface layers and no luck. When i add the fractal terrain through the merge, I get crazy negative altitude values in the preview window. Would the displace to zero clip help? Or could you hook these plants to a SSS at ground zero like your other function clips? A brief example node setup would be nice. Thanks.