Tile Overlap

The Tile Overlap setting for Stable Diffusion is a parameter that controls how much the tiles overlap when the image is divided into smaller pieces for upscaling. This can help to avoid visible seams or artifacts at the edges of the tiles. A good parameter depends on the image content and the upscaler model, but a general recommendation is to use a value between 8 and 15. This means that each tile will overlap with its neighbors by 8 to 15 pixels on each side. A higher value can produce smoother results, but it will also increase the computation time and memory usage. A lower value can speed up the process, but it may introduce more noticeable seams or inconsistencies. You can experiment with different values to find the best balance for your image.

Here is an example of how to use the Tile Overlap setting in the automatic1111 webui:

• Go to the img2img tab and select the SD upscale button (or the SD Upscale script in the latest version).
• Load your initial image into the box on the left (e.g. 512x512).
• Choose an upscaler model from the drop-down menu (e.g. RealESRGAN 4x Plus).
• Enter a value for the Tile Overlap parameter in the box below (e.g. 10).
• Adjust other settings as desired, such as iterations, CFG scale, and denoising strength.
• Click Generate and wait for the result to appear on the right (e.g. 1024x1024).
• Click Send to img2img and repeat steps 4 to 6 until you reach your desired resolution (e.g. 8192x8192).