> For the complete documentation index, see [llms.txt](https://qwertystudio.gitbook.io/calysto/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://qwertystudio.gitbook.io/calysto/heightmap-stamp-database.md).
# Heightmap Stamp Database
## Stamps database
Calysto World uses the heightmap stamp database to decide which terrain stamps can be spawned by the **Heightmap Generation** tool.
By default, the generator reads the available stamp categories from:
```
DA_AllHeightmaps
```
You can remove, add, or modify stamp categories to fit your project.
After changing the database, reopen the **Calysto World Editor** so the UI can refresh and display the new categories.
***
### Create a New Stamp Category
To create a new heightmap category:
1. Right-click in the Content Browser.
2. Create a new **Data Asset**.
3. Select:
```
PDA_Heightmap
```
4. Add the new data asset to `DA_AllHeightmaps`.
***
### Heightmap Settings
**Heightmap**\
The 2D heightmap texture used to shape the landscape. The included heightmaps are 4K by default.
**Type**\
The category used by Calysto World when spawning stamps.
**Blend**\
Controls how this stamp blends with other stamps already in the world.
**Offset**\
Adds a height offset to the stamp.
**Random Rotation**\
Allows the stamp to spawn with a random rotation. Disable this when the stamp needs a specific direction, such as sand waves or directional terrain patterns.
**Size Multiplicator**\
Adjusts the final size of this stamp category.
***
### Important
Before editing the default databases, read **Preparing for Future Updates**.
For safer updates, duplicate the database assets you want to customize instead of editing the original Calysto files directly.
***
### Extra Stamp Collections
World Protocol created an additional stamp collection with a ready-to-use database. You can use it if you want more [heightmap](https://www.fab.com/sellers/World%20Protocol) variety.
