As part of trying to figure out inlays, I came across this comment from May, 2012.
This can be demonstrated by turning solid on in the preview tool path and then looking at the drawing.
I thought it would be a great idea to turn on solid when previewing the toolpaths and then seeing the area carved out by the cutting tool, but it doesn't seem to work. I created the attached test file to demonstrate this.
To see what I mean, open the attachment and go to "Preview Toolpaths." At the bottom, make sure both "Show 2D previews" and "Solid" are checked on. Then preview the toolpaths. Notice that the bottom two boxes are of different sizes in the 3D preview. I put in some vertical lines to make this obvious. Now, make sure there is a checkmark next to each toolpath on the toolpath list, and then click on the tab to go back to the drawing view. In this file, the tab will be labeled "Test of solid toolpath previews.crv" Notice the solid colored outline is the same for each of the bottom 2 squares, relative to the square. If you switch back and forth between the 3D view and the drawing view, you see that the squares are carved differently on the 3D view but they show up the same on the drawing view. Do you see what I mean?
It seems to me that the "solid" toolpath preview in the drawing tab should be shaded anywhere the tool cuts at z=0. This isn't the case, because the tool is cutting places that aren't shaded. So do I misunderstand this feature, or does this indicate a bug in the software? I'd appreciate any help in understanding this feature.