An always visible script extension for stable-diffusion-webui to configure seamless image tiling independently for the X and Y axes.
To use, install this repository from the "Extensions" tab in stable-diffusion-webui, restart your server, open the Asymmetric tiling foldout on txt2img or img2img, and make it active, and check Tile X or Tile Y as desired. While this script is active, the Tiling checkbox in the main UI will be ignored.
Like existing tiling options this won't guarantee seamless tiling 100% of the time, but it should manage it for most prompts. You can check that images tile seamlessly using online tools like Seamless Texture Check.
For the old, non-extension version of this script, use the "classic_script" branch.
Support Forge (https://github.com/lllyasviel/stable-diffusion-webui-forge)