In this video I show my ComfyUI Ultimate Upscaler workflow and explain how I use it to upscale images with tiled generative detail enhancement. I go through both versions of the workflow: one built around SDXL and one built around FLUX. SDXL is usually my preferred option because it has a smaller footprint, runs faster, and uses much less VRAM, while FLUX can sometimes produce better results but is heavier and slower.