# Enhancer & upscaling (/docs/generating/enhancing)



The **Enhancer** upscales and cleans up images and videos, both ones you generated in SimpliGen and files you upload. It lives in its own section in the navigation, not inside the image/video generators; presets themselves generate at fixed resolution tiers, and the Enhancer is how you go beyond them.

## The enhancers [#the-enhancers]

* **RTX Upscaler**: small (\~100 MB), fast, runs directly on your GPU. Good default for images.
* **SeedVR2**: a heavyweight AI enhancer (model download of several GB, variant-dependent) that reconstructs detail rather than just sharpening. Best quality for video and demanding images. Ships in multiple variants; pick the one that fits your VRAM, and prefer the **balanced** preset if you see artifacts.

## Using it [#using-it]

1. Open **Enhance** in the navigation rail.
2. Pick a source: a generation from your gallery, or upload a file.
3. Choose the enhancer and scale factor, then run it. Results land in your gallery like any generation.

## Limits & quirks [#limits--quirks]

* **4K output cap.** Upscales stop at 4K; a scale factor that would exceed 4K is unavailable (grayed out). Tiled upscaling beyond 4K isn't supported yet.
* Enhancing is GPU-heavy like generating: long or high-resolution videos take time and VRAM, and can hit the same out-of-memory limits ([Out of memory](/docs/troubleshooting/out-of-memory)).
* If SeedVR2 output shows a **grid / brown bars pattern**, switch to the balanced preset.
* Upscaling can't invent what isn't there: a very blurry 480p source stays soft at 4K. For best results fix quality at generation time first ([Improving output quality](/docs/troubleshooting/quality)).