Why does 480p Grok Imagine video look cleaner than 1080p open-source Wan/H3?
yolsuzyolcu · reddit · 2026-10-19
A technical r/StableDiffusion discussion: the author finds 480p Grok Imagine output (both i2v and t2v) looks cleaner and crisper than 1080p output from open-source Wan 2.2 and MiniMax H3. It's not sharpness — H3/Wan frames show a mushy, noisy quality with under-resolved fine detail, worst on faces (skin texture, eyes, lips, hairlines), visible even on paused single frames. It's also separate from the "plastic AI face" issue, and raising resolution doesn't fix it; lowering H3's shift value slightly helps, hinting sampling/noise scheduling is involved. Candidate causes discussed: VAE/latent compression, sampling schedules, training objective/data, Grok's backend reconstruction, or model capacity.
More from Multimodal
- AI Toolkit adds LoRA training for Qwen 3.8 27B: 70-80 tok/s captioning under 20GB VRAM on RTX 5090 — ostrisai · 2026-10-19
- Open-source RapidRAW adds 2.5D relighting via depth and normal maps, zero identity loss — zBlackVision11 · 2026-10-19
- Moss SFT tested on non-portrait scenes: photoreal car showroom generations — Perfect-Campaign9551 · 2026-10-19
- 20 five-color palettes with HEX values and a Midjourney workflow for precise color control — tisch_eins · 2026-10-19
- AI-generated cyberpunk fight scene Yopparai - Drunken Brawler — Cappinski · 2026-10-19
- Microsoft MAI reveals in-house 3T-parameter base models with native encoder-free VLM pretraining — burny_tech · 2026-10-19