What methods do you use to colour fake stones? I have some merged stone setups that have their own colour in their surface layer, but they are completely masked by the underlying terrains colour. I tried just changing the last merge shader grayscale and using a colour adjust for more solid whites, but for some reason the mask didn't match the rocks.
The colour of the fake stones shows in the merge shader before piping into the surface layers child node, after that, viewing the surface layer shows a solid carpet of terrain colour.
To clarify, this is more a lateral colouring issue, or where overhanging occurs.