Thank you for your reply.
I am suggesting seamless and autosave as separate features. Sorry for the confusion, I don't know the proper terminology.
Seamless is the feature I want for generating textures and background images, and is covered below. it seems to be enabled by the StableDiffusion setting, but I don't know the details. in AUTOMATIC1111 it is enabled by checking "Tiling".
Image output tiling for seamless textures with Stable Diffusion · Issue #556 · huggingface/diffusers
https://github.com/huggingface/diffusers/issues/556
Autosave wants the images returned from the request to be saved directly to the specified folder.