When 3d engraving on medium draftboard, the masking is melting into goo at edges of deep areas. Is this expected?
In the image you can see the 3d engrave on the bottom. The black shiny bits are melted masking. You can see where I peeled back the masking on one leaf to the edges of the melt. The top is an old engrave of a less contrasty version of the same image.