# Page Not Found

The URL `korean/undefined-2/add-filters/mask-in-arid-locations` does not exist.

You might be looking for one of these pages:
- [Add River](https://docs.world-creator.com/walkthrough/add-filters/mask-in-arid-locations.md)
- [Add Erosion Filter](https://docs.world-creator.com/walkthrough/add-filters/add-erosion.md)
- [Basic Erosion](https://docs.world-creator.com/reference/terrain/biome/filters/basic-erosion.md)
- [Add Base Gradient Material](https://docs.world-creator.com/walkthrough/add-filters/add-base-color.md)
- [Mask Layers](https://docs.world-creator.com/reference/terrain/mask-layers.md)

## How to find the correct page

1. **Browse the full index**: [/sitemap.md](https://docs.world-creator.com/sitemap.md) - Complete documentation index
2. **View the full content**: [/llms-full.txt](https://docs.world-creator.com/llms-full.txt) - Full content export

## Tips for requesting documentation

- For markdown responses, append `.md` to URLs (e.g., `/walkthrough/add-filters/mask-in-arid-locations.md`)
- Use `Accept: text/markdown` header for content negotiation