initial refiner support

[AUTOMATIC1111]

Description

• two settings on Stable Diffusion page: Refiner checkpoint and Refiner switch at.
• first lets you select a model.
• second lets you select a ratio.
• during sampling, when the number of steps goes above the amount specified by Refiner switch at setting, webui switches to a different model (Refiner checkpoint).
  • for example, if sampling with 20 steps and Refiner switch at = 0.25, the switch will happen after 5 sampling steps.
• switch back to original checkpoint happens after you start generating the next picture (subject to change?)
• tested with SD1.
• tested with SDXL.
• refining SD1 with SDXL or refining SDXL with SD1 with the way it's implemented is not a thing.
• works with kdiffusion samplers.
• works with compvis samplers! DDIM, PLMS, UniPC work.
• not tested with medvram/lowvram
• infotext support
• in future i plan to integrate this in a nice way into main UI, for now you just gotta put it into quicksettings bar
• other PR: Alternative refiner implementation #12377

[anae-git]

How do you disable it once set? Shouldn't there be a "None" at the top the list?

[AUTOMATIC1111]

disable by setting Refiner switch at to 1.

[rltgjqmcpgjadyd]

I think it's better to have the refiner options in the Settings - SDXL tab. :)

[tmprabubiz]

Wow, this is ultimate. No need of installing any other webui for the sake of speed. But how to have these options in A1111. I can't find in settings. I don't know coding. May somebody guide to use this option..

[Aonodensetsu]

this is merged into dev, which means it's not on the mainline version yet, but will be coming soon

[WaGi-Coding]

Imo it would be better if the switch at would work the other way round.

So if you set it to 0.1 on 30 steps, the last 3 steps will get refined. Or the last 6 with 0.2 and so on

[uomathguy]

This new refiner switch is nice! But why doesn't it have a "denoising strength" option for the refiner. That is a crucial element of using the refiner. Thanks!

[RamishRasool14]

Is this refiner available from the api docs?