Update README.md

README.md

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 # UltraWan LoRA — ComfyUI Conversion (Unofficial)
 
-**This lora only works with the T2V 1.3b model, it does not work with the 14b.**
+**This lora only works with the T2V 1.3b model, it does not work with the 14b. The 4k model has some problems, but the 1k model works well.**
 
 This repository contains **converted LoRA weights** from the official [**APRIL-AIGC/UltraWan**](https://huggingface.co/APRIL-AIGC/UltraWan) release.  
 The only modification made was converting the `.ckpt` / original format into `.safetensors` compatible with **ComfyUI**.