I got a bit more into landscapes for UE4 and while I was building an HDA to trace a dirt path on my already fully textured and layered landscape, I encountered an annoying need : all the previous layers of grass, rocks and such needed to be updated because my dirt layer was mixing with them.
So I did a small tool HDA that picks a heighfield, and a mask, and goes through all the layers existing inside the heighfield to make a subtract using the feeded mask.
I am posting this for 2 reasons:
-maybe I missed out an easy solution to do this
-if that can help anyone (or better : end up as a Labs tool; but I might as well dream about that)
Any feedback would be nice
Gargam