Can the photographed or scanned map be slightly contrast / lightness / saturation adjusted in case if the photograph or scan doesn't match the actual map (i.e. for the purpose of matching the original map)? I can photograph or scan my watercolour maps but with photos the colours often become washed out and the scanning results are overly bright, to the point of being garish.

I do pottery and was thinking that it could be fun to make my hexes out of clay. Just want to confirm that would qualify. I’ll hopefully have them fired and photographed by the deadline, but worst case could have some in-progress shots I could use if they don’t turn out.