A panel for grayscale purposes has five ridged protrusions. One side of these ridges must be colored black, while the other side should be colored white. Initially, an attempt was made to color the necessary portions black by masking the white parts, but, as shown in the photo, this approach failed. This was due to the fact that the 3D-printed part has layered irregularities, causing the paint to flow beneath the mask.

Therefore, a decision was made to output the parts with black filament and apply white stickers. The stickers were created by cutting down larger ones typically used for labeling. Since five stickers need to be applied to each panel, a total of 1,280 stickers had to be created and affixed for 256 panels.