Last week, I generated a video of a couple dancing—but halfway through, their faces turned into blobs and the man’s hand looked like a claw. Sound familiar? After 20+ failed attempts, I finally cracked the code to fix blurry AI videos in seconds using WAN 2.1 and ComfyUI. No more starting from scratch—let’s salvage those videos!
Files You NEED
here’s the only models you need:
- WAN 2.1 TV2 1.3B BF16 Model → Download(Save to
ComfyUI/models/diffusion)- Why BF16? It’s lighter on VRAM than FP16. My RTX 3070 Ti loves it.
- VAE File → Download(Save to
ComfyUI/models/vae)- Skip this, and your colors look like a washed-out TikTok filter.
- UM5T5 XXL FP8 Text Encoder → Download(Save to
text_encoder)- Fixes blurry text and logos in videos.
- LORA → Download(Save to
Loras Folder)
My Base Settings (Tested on 12GB GPUs)
here’s what worked:
- K Sampler:
- Steps: 40 (Lower = blurry edges, Higher = overkill)
- CFG: 6 (Balances detail and stability)
- Denoise: 0.4 (Start here! 0.6+ erases original motion)
What is Skip Layer Guidance?
Skip Layer Guidance (SLG) is like a targeted repair tool for your videos. Here’s how it works:
- Fixes Melted Faces: It regenerates broken parts (like eyes, lips, or hands) without changing the overall motion.
- Blocks 9 & 10: These are the magic layers. Other blocks (like 7-8 or 11-12) caused flickering or weird artifacts in my tests.
- Start=0.2, End=0.8: This gradual fix ensures smooth transitions between frames.
Real-World Example: I had a clip where a character’s face melted into a puddle at the 3-second mark. With SLG (blocks 9 & 10), the face stabilized, and details like eyes and lips sharpened—all motion preserved!
What is Tile Laura?
Tile Laura is your detail booster. It’s perfect for videos that are almost there but need that extra polish. Here’s when to use it:
- Add Realistic Textures: Skin pores, fabric wrinkles, or tree bark.
- Enhance Shadows: Made a flat-lit scene look cinematic with depth.
- Avoid If: Faces/hands are severely glitched—it can’t rebuild missing parts.
My Workflow:
- Run Skip Layer Guidance first to fix major issues.
- Apply Tile Laura to boost textures.
- Adjust denoise=0.3 here—higher values overwrite details.
