The module already has VAE. Unless you have specific coloring requirements, it is recommended to use the VAE inside the module. Due to the unique nature of v-pred, I have created a dedicated section for v-pred. If you need use LoRA, it's better to use the v-pred LoRA to avoid potential problems.
Recommended Parameters:
Samplers: DDPM(suggest) > Euler > DDIM > Euler a (⚠️ Other samplers will not work properly)
DDPM
CFG: 5.5 (around 5.5)
Steps: 40 (around 40)
Hi-res: Upscale 1.5x or higher, Denoising strength 0.15–0.45
Euler (a)
CFG: 4~7
Steps: 20~30
Hi-res: Upscale 1.5x or higher, Denoising strength 0.15–0.45
Resolution: Total area around 1024x1024. Best to choose from: 768x1344, 832x1216, 896x1152, 1024x1024, 1152x896, 1216x832, 1344x768
ComfyUI : https://huggingface.co/Laxhar/noobai-XL-Vpred-0.5/blob/main/comfy_ui_workflow_sample.png
For Training v-pred LoRAs : https://civitai.com/articles/8723/vlora-or-how-to-train-a-lora-on-v-pred-sdxl-model
Adetailer : https://github.com/Bing-su/adetailer