These are pruned fp16 safetensor versions Illyasviel's pretrained controlnet models located here: https://huggingface.co/lllyasviel/ControlNet
Intended for use with Mikubill's Automatic1111 web-ui controlnet extension. Significantly reduced VRAM consumption and size. Also less likely to run into conflicts involving running a fp16 model and using low VRAM mode.
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