There’s been some discussion about topo map-style contour lines within World Machine.
As a way to take a fun break from endless bug-squashing getting Artist Point ready for dev release, I got a chance to add contour lines as a guide tool in WM.
This is a simple viewport-only effect, but it is reasonably high quality and is actually rather useful in getting the sense of the terrain in low-relief areas especially.
Here it is applied over no-light/no-material. You can of course use it with both of those if desired.