So you want to remove the mosaic filter? That will probably just make it look worse. Anyway, $009F46 is the start of the mosaic routine. I think it's accessed with a JSL, so just putting an RTL at the start might work. According to the ROM map that method is buggy, but it doesn't say how. It's worth a try though, I think.
allow shy guy emojis in post footers you cowards!