The clusterwork is nice, however, I think it sacrifices too much texture, specifically on the bricks. I think you should apply a bit more texture. The shape of clusters should reflect the texture of the material it's placed on, it shouldn't always be amorphous blobs. Besides that, I quite like the purple. It makes the piece dynamic and memorable. Nice work.
well i was more thinking of palette replacements. I guess mask was not the correct word.
If this was on a modern console (and even in some cases a modern custom engine with palette modify functions) you could just replace the purple sub palette with whatever youd like.
I believe it isn't a mask because the bricks near that area are also lit.
Love it though i dont know how I feel about the purple unless thats a mask color for the user to add their own.
good work