Push HunyuanVideo past local limits — 4K · 8K · 16K
Running Tencent's HunyuanVideo locally in ComfyUI means VRAM and resolution limits smear away detail. Clean the leftover noise and inter-frame flicker with non-generative post-processing and lift it to 16K — without touching the original.
What's capping the quality of your local Hunyuan footage
HunyuanVideo is excellent for an open-weight model, but running it on a local GPU leaves clear limits on resolution and high-frequency detail. You can pass those limits without re-rendering.
Resolution bound by VRAM
Generating within local GPU memory usually caps you at 720p–1080p, so detail falls short on a big screen.
Lost high-frequency detail
Fine textures like hair, skin and fabric smear soft and take on a plastic feel.
Inter-frame flicker
Local sampling leaves subtle frame-to-frame flicker and residual noise plainly visible.
What AI PIXELL does
Real resolution increase
Not stretching — it restores detail up to 4K, 8K and 16K (max 16K).
Non-generative, original untouched
The AI never repaints. Only existing information is sharpened — no face or detail distortion.
Noise & artifact cleanup
Removes diffusion residual noise, compression blocking and frame flicker via denoise.
No length limit · one-time purchase
15 seconds or an hour, no limit. A lifetime license instead of a subscription.
The blur disappears,
real detail comes back
Lift local 720p Hunyuan footage to 4K and 8K — keeping texture and detail while calming the flicker.
How it works
Generate
Make your video with your usual AI model.
Upload
Load the exported file into AI PIXELL.
Set & preview
Pick resolution and model, then preview the result.
Export
Export at 4K, 8K or 16K and publish anywhere.
Where does the “AI look” come from?
Diffusion models build video by removing noise step by step. Structural flaws that never get fully removed remain in that process — and that is exactly what reads as the “AI look.” AI PIXELL cleans up only those traces, non-generatively.
Residual noise at the last step
The noise schedule fails to drive SNR to zero at the final denoising step, so tone gets trapped in mid-brightness and contrast is flattened. (WACV 2024)
Error accumulating each step
Estimation error compounds across steps (exposure bias), collapsing detail and distorting texture — worse with fewer steps. (ICLR 2024·2025)
High-frequency detail loss
Generated in a compressed latent then upsampled, fine detail like pores, fabric weave and hair gets smeared.
Plastic texture
Denoising toward an “average skin” erases texture while over-sharpening edges, giving a synthetic, CGI-like look.
Inter-frame flicker
An image-trained VAE decoder introduces subtle inter-frame shimmer when turning latents back into pixels.
Suppressed real-footage grain
Smoothing frames to stop face jitter also suppresses the sensor grain of real footage, so it reads plastic on playback.
Sources: “Common Diffusion Noise Schedules and Sample Steps are Flawed” (ByteDance, WACV 2024) · Exposure Bias in Diffusion Models (ICLR 2024·2025)
Beyond Hunyuan 4K — up to 8K and 16K
Take the clips you generated free and unlimited and export them at the resolution uploads, client delivery or exhibition demand.
Who it's for
Designers & video editors
Anyone finishing generative sources to delivery quality.
YouTubers & creators
Publish short- and long-form in 4K for a competitive edge.
Companies & brands
Teams outputting bulk AI ad/campaign clips at consistent quality.
Every creator
Anyone who wants to erase the AI look and make video feel real.
Frequently asked questions
Give your local Hunyuan footage the final quality step it's missing
Turn the 720p Hunyuan clips capped by VRAM into 4K, 8K and 16K. Start post-processing with AI PIXELL now.