ripped from NI (x4128) denoised, leveled, guarded posterization, with spreads joined. thanks Aleph for helping me on v03 and v06 spreads. --- v01-02: [#1942029](https://nyaa.si/view/1942029) --- this has been on my drive for a while (5+ months) and I'm finally not lazy enough to process it :) also this use new method for leveling and posterizing to speed-up processing, so yell at me if there's any issues.