Independent Condition Guidance / Time-step Guidance

[v0xie]

WIP implementation of https://arxiv.org/abs/2407.02687

ICG is in its own dropdown, it requires CFG scales much lower than usual.

TCG is implemented on top of PAG for now. Recommend TCG Scale < 1.0. If TCG Alpha is greater than 0, it's used for power scaling, otherwise it's constant scaling.

PAG needs a rewrite to make it more extensible to other methods like this which require their own passes.

SD 1.5: Seed 1: prompt "a cute puppy"

Seed 1, no prompt: