Schnell variant of Flux.1 by Black Forest Labs.
Lighter, faster, cheaper.
At a compromise of course.
Usual recommended step number is 4, but since it takes the same amount of credits I've set it to 5. A higher number may still enhance the quality.
Recommended samplers and schedulers
For starters, euler is a safe choice most of the time. But you might want to experiment a bit on the topic.
Flux.1 likes deterministic samplers and is not able to converge stochastic ones. Which means, AVOID sde or ancestral samplers as they will only give you totally blurred out images.
Also avoid ddpm which bevahes similarly to euler_ancestral.
The remaining ones, most of them should work fine.
Simple and sgm_uniform schedulers work fine with probably all the samplers.
Karras and exponential can't converge well and give "foggy" images which you can still use in a creative way sometimes.
Normal is fine with euler and others, but can get oversharpened with dpmpp_2m or heun.
Beta sometimes can get harsh but seemed to be more versatile than normal.
