More workflows, including the packs: tinytensor.gumroad.com
Takes a 1024x1536 render to 4096x6144 with Real-ESRGAN 4x+. One model load, one scale node, no manual tiling.
Measured on an RTX 3070 Ti Laptop with 8GB of VRAM: 14-16 seconds per image at 25 MP. The upscale model is 64 MB.
Install: drop the JSON into ComfyUI/user/default/workflows, put RealESRGAN_x4plus.safetensors into models/upscale_models, open the graph, pick your image, queue.
Nodes: LoadImage -> UpscaleModelLoader (Real-ESRGAN 4x+) -> ImageUpscaleWithModel -> ImageScaleBy (1.0 for true 4x, 0.5 for a 2x result that keeps the detail with a quarter of the file size) -> SaveImage.
Licensing: Real-ESRGAN 4x+ is BSD-3-Clause, so commercial use of the output is fine. 4x-UltraSharp is sharper on line art but CC-BY-NC-SA, personal use only. The workflow file is yours to use; please don't resell the JSON itself.upscaleesrgancomfyuiworkflow4xupscale