I recently watched a Minecraft video and noticed that he used a World Painter tool to create an overhanging/bridge stone structure for his terrain.

I went ahead and tried to pull references in nature and found these:




I was wondering if something like would be possible to create inside Houdini and how to go about this? I can't imagine being able to create this with just a heightmap, but how would you integrate this well into a terrain heightmap? How would you export it?