Killer lcm upscale settings with an extremely fast Upscale Model Loader and custom KSampler by ‪@MachineDelusions‬

💖 Use your favourite LCM setup
📌 VAE Decode image from your first run to FL Upscale Model to FL KSampler Plus

ComfyUI Fill Nodes
github.com/filliptm/ComfyUI_Fill-Nodes/tree/main

FL Upscale Model
This node upscales the input to the size of your model so if you use a 4x model it will upscale the images to 4x, you then use the "downscale by" widget to tell it where to go down from that destination.

4x model then downscale by: 0.5 = 2x initial res
2x model then downscale by: 1 = 2x initial res

FL KSampler Plus

Start with these settings
denoise: 0.2
overlap: 0.05
steps: 4
cfg: 1 to 2
sampler_name: lcm
scheduler: beta
input type: image

Slicer settings allow you to do tiled upscaling with very clean seams. That means more tile runs at lower res quilted together into a super high res version.

slicer_x = num slices on the x axis (horizontal)
slicer_y = num slices on the y axis (vertical)

16:9 is wide so
slicer_x: 2
slicer_y : 1

9:16 is tall so
slicer_x: 1
slicer_y: 2

square tiles are square so just make the tile slices equal

Your goal is to make sure the tiles are less than 1024x1024, so if you're going to like 4k you will need more tile