How do I use the TiledKSampler ?

[UglinessInTheUI]

I'm trying to generate one big image but I get multiple unrelated images of 512x512 inside one big image. Is it possible to render a 1920x1080 image by splitting it in 512x512 tiles ? I only have 8GB of video ram.

[michaelLochlann]

it sounds like what happens when denoise is set to 1.0 on a large image. try setting denoise lower if it's not the 1st sampler in the chain

[UglinessInTheUI]

I'm not trying to do img2img or up-scaling. I'm trying to generate one big image using txt2img but it either runs out of video memory or I get multiple unrelated images inside one big image. I guess each tile gets a different seed value and it generates different images for each tile. So far, only the Ultimate SD Upscale worked but only for img2img up-scaling.

[BlenderNeko]

All tiled approaches limit the spatial awareness of the sampler. So when you do txt2img with a tiling strategy that denoises tiles separately you do indeed get a series of unrelated images. If instead you pick the random strategy you will get one image but that will likely be some fever dream where things are repeated multiple times. The way this is usually used is together with an already existing image to nudge the diffusion proces in the right direction.

On Fri, 27 Oct 2023, 06:11 UglinessInTheUI, @.***> wrote:

I'm not trying to do img2img or up-scaling. I'm trying to generate one big image using txt2img but it either runs out of video memory or I get multiple unrelated images inside one big image. I guess each tile gets a different seed value and it generates different images for each tile. So far, only the Ultimate SD Upscale worked but only for img2img up-scaling.

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[UglinessInTheUI]

These are some of the results I've got so far from txt2img. I'll have to try the img2img.