Because the marks are for your laser, not the printer, and they have to stay flat. The build layers take multiple overprints of raised ink; building the marks would leave your cutter trying to optically read a target that has been physically raised. The colour and build files are not registered to each other at all — they are stacked as layers in one RasterLink job and printed in a single pass, so they line up by being the same canvas at the same origin. PatchForge keeps that frame identical for you. (A single patch has no marks in the first place, so this only applies to gang sheets.)
Sep 12, 2026