Add a bunch of grid images

README.md

@@ -26,7 +26,7 @@ Too low or too high of a "Steps" value breaks the model. Try something like 15-3
 
 To install, copy the `.safetensors` and `.yaml` files to your Automatic1111 ControlNet extension's model directory (e.g. `stable-diffusion-webui/extensions/sd-webui-controlnet/models`). Completely restart the Automatic1111 server after doing this and then refresh the web page.
 
-There is no preprocessor. Instead, supply a black and white checkerboard image as the control input. Examples are in the `example-control-images` directory of this repository. (https://huggingface.co/thomaseding/pixelnet/tree/main/example-control-images)
+There is no preprocessor. Instead, supply a black and white checkerboard image as the control input. Various control image grids can be found in this repository's `grids` directory. (https://huggingface.co/thomaseding/pixelnet/tree/main/grids)
 
 The script `gen_checker.py` can be used to generate checkerboard images of arbitrary sizes. (https://huggingface.co/thomaseding/pixelnet/blob/main/gen_checker.py) Example: `python gen_checker.py --upscale-dims 512x512 --dims 70x70 --output-file control.png` to generate a 70x70 checkerboard image upscaled to 512x512 pixels.
 
@@ -34,6 +34,10 @@ The script `controlled_downscale.py` is a custom downscaler made specifically fo
 
 ### FAQ:
 
+Q: Png or Jpeg?
+
+A: Use Png. Jpeg's compression algorithm is terrible for pixel art.
+
 Q: Why is this needed? Can't I use a post-processor to downscale the image?
 
 A: From my experience SD has a hard time creating genuine pixel art (even with dedicated base models and loras), where it has a mismatch of logical pixel sizes, smooth curves, etc. What appears to be a straight line at a glance, might bend around. This can cause post-processors to create artifacts based on quantization rounding a pixel to a position one pixel off in some direction. This model is intended to help fix that.