ComfyUI_UltimateSDUpscale

Why we included this project

Anyone who upscales large images with Stable Diffusion has probably hit the wall where the model either runs out of memory or leaves the upscaled image looking soft. This node set works around that by chopping the picture into tiles, running each one through the image-to-image diffusion pass, and stitching the results back together. Tiling is what lets it recover fine detail that a plain upscaler misses, and it keeps memory use low because the model only ever sees a tile-sized chunk. Since it is a direct port of the Ultimate SD Upscale script from the Automatic1111 ecosystem, the parameter behavior will feel familiar if you have used that tool before. The repo also ships documentation for the node parameters, example workflows, and templates reachable right inside the ComfyUI interface.