When I use crater shaders under any section of the object populations I use for grass and trees etc. the objects float above the original terrain layer and do not follow the contours of crater shaders, when negative values, or any kind of rim. I am using Terragen 3.3.03.0 I believe the latest update. This is an ongoing issue as I try to work multiple layers and other sources together... which all works fine until I do the fine tuning for a lump I dislike in a river or anything. And then this bug crops up so the fix is not really a fix.
I have _Fit To Terrain_ selected but in all other cases no other selection works and usually if you do so the trees appear high up in space... and never come down forcing a reload. Also this happens with a negative depth on the craters. To me this sounds like a bug in the software, but if there is a workaround I would love to hear about it.
I am trying to find an example but I seem to have erased all of them as glitched renders. It is simple enough to replicate.