This is neat -- I'm reading the code and learning stuff.<p>And automating things like this is undeniably fun.<p>But since the pink layer is derived from the wall layer, I am not sure how much of an advantage this presents in a practical sense over the Photoshop-ish approach, of laying the pink over the wall with a "colour burn" blend mode, and using a slightly blurred noisy mask (or distressing the mask layer in some other way).<p>That could also be set up programmatically in Photoshop (JS) and <i>probably</i> in Krita (Python).<p>Can you do similar blend mode tricks with scikit-image?