I am having a problem with one area of a 3D model I am trying to create. I am trying to get the lake at the bottom right (blue outline) to sit just below the terrain (about 2-3mm) so that I can put a thin layer of epoxy in there. I am using the EQUAL merge and starting it at a base height of 3.5 inches and then just adding about .1 inches to it (none of the other merge options seem to get me an even shallow bowl).
You are showing the toolpath simulation, and the toolpath doesn’t cut in that area. Don’t include that boundary in the toolpath & it should do what you want.
It looks like you may want just the outside boundary for the 3D paths, or the outside and the 8 raised areas if you want to leave those workpiece height