This extension becomes unnecessary with the Realse 1.6 of A11111 !

There will be native sdxl support and in the hires. fix the model can be changed. See:

realse notes

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SD WebUI SDXL Refiner Hack

Use the SDXL Refiner Model for the high-res fix pass. Hopefully, we won't need this extension for a long time.

This is not the same as the Refiner used in Comfy UI!

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You need to enable high-res fix.

System Requirements

• 32GB RAM (Not VRAM)

SDXL requires a lot of RAM so the more the better. With 32GB, it will use ALL of your RAM. Close everything you don't need to have open. <br> Also, use this pull request with 32GB RAM to reduce RAM usage.

recommendations

• Use this VAE (fp16)
• Set batch count to 1 (for 32GB RAM)
• Other settings as you would normally

My settings:

• Upscaler: Latent
• Upscale by: 1.25
• Denoising: 0.53

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The default values can be changed in the settings

Of course, this extension can be just used to use a different checkpoint for the high-res fix pass for non-SDXL models.