Proof of concept node that upscales the segments inside a detailer node, faster, uses less VRAM and for some reason less noticeably seams.
Also a modified "Make Tile SEGS" that automatically calculate bbox based on crop region, crop factor and upscale.
Upscaling to 16k:
Upscaler + detailer took 3897 seconds and almost went OOM with an Geforce gtx 4090
This node took 1820 seconds
Most code taken from Impact-pack https://github.com/ltdrdata/ComfyUI-Impact-Pack
Upscaler stuff taken from Comfyroll Studio https://github.com/Suzie1/ComfyUI_Comfyroll_CustomNodes