SSR-Merge: Subspace Signal Routing LoRA merge technique for ComfyUI

SSR-Merge: Subspace Signal Routing LoRA merge technique for ComfyUI

I've experienced a bit with the SSR LoRA merge technique using Krea 2 and a custom script. So I decided to make a custom node in ComfyUI with the help of Claude Code.

https://github.com/frutiemax92/ComfyUI-LoRA-SSR

The SSR merging technique requires "calibration" conditioning to keep some parts of the LoRA intact, making this a superior merge as a linear one. It's a more demanding process than the linear merge, but it produces better results, I could keep the LoRA strengths up to 1.0 without degrading the image quality.

This image uses Krea 2 with 3 big LoRAs that are themselves SSR merges of other LoRAs, and it worked on my setup with 64GB of RAM and 12GB of VRAM. I haven't tested with other models, but this should work pretty straightforward.