loonalone/Z Image 4X UPSCALER by Helaman
Z Image 4X UPSCALER by Helaman {this is not LoRA.} 4x photo upscaler which handles jpg compression. This model will preserve noise. General upscaler: Realistic - Restoration Training details: AdamW optimizer with U-Net SN discriminator and BFloat16. Degraded with otf jpg compression down to 40, re-compression down to 40, together with resizes and the blur kernels. Losses: PixelLoss using CHC (Clipped Huber with Cosine Similarity Loss), PerceptualLoss using Huber, GANLoss, LDL using Huber, YCbCr Color Loss (bt601) and Luma Loss (CIE XYZ) on neosr . ComfyUI/ └── models/ ├── upscale_models └── 4x
| Author / organization | loonalone |
|---|---|
| Downloads | 6.5K (as reported by Civitai) |
| Likes | 174 |
| Task | text-to-image |
| Created | 9 February 2026 |
| Last updated at source | — |
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