Tip: Switch palace switches normally disappear if you replay the level. However, if you insert them as direct Map16 and use the hex-edit at $00EEB2 in the ROM map, you can replay the level without a problem.
Change $009F59 from D0 to 90 to eliminate all fadeouts. (use in conjunction with $009F2F). Mod note: I've heard that this one is buggy. Use on your own risk.
$009F67 controls which layers are affected by the mosaic effect.
The numbers present the layer numbers to add mosaic on. So 1 = Layer 1, 2 = Layer 2, etc.