Create INSTALL.md

INSTALL.md

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+# Installation
+E621 Rising V3 is ready to use with Stable Diffusion WebUI, Python, and anything else that can load SDXL `safetensors` files.
+
+## Using with Stable Diffusion WebUI
+### Setting Up
+1. Install [Stable Diffusion WebUI](https://github.com/AUTOMATIC1111/stable-diffusion-webui)
+2. Download [`e621-rising-v3-epoch27.fp16.safetensors`](https://huggingface.co/hearmeneigh/e621-rising-v3-safetensors/resolve/main/e621-rising-v3-epoch-27.fp16.safetensors)
+3. Copy/move the file to `<stable-diffusion-webui>/models/Stable-diffusion`
+4. Reload WebUI checkpoints
+5. (Recommended) [Install Tag Autocomplete for WebUI](https://huggingface.co/hearmeneigh/e621-rising-v3/blob/main/AUTOCOMPLETE.md)
+
+For more information, [see here](https://github.com/AUTOMATIC1111/stable-diffusion-webui/wiki/Features#basic-models).
+
+
+## Using with Python
+
+```python
+from diffusers import DiffusionPipeline
+import torch
+
+pipe = DiffusionPipeline.from_pretrained("hearmeneigh/e621-rising-v3", torch_dtype=torch.float16, use_safetensors=True, variant="fp16")
+pipe.to("cuda")
+
+# if using torch < 2.0
+# pipe.enable_xformers_memory_efficient_attention()
+
+prompt = "An astronaut riding a green horse"
+images = pipe(prompt=prompt).images[0]
+```