Save and share seed files

A seed file (.hmseed) saves a complete island setup: the seed number, all your slider adjustments, the map size, and any multi-island layout. It is not just a single number. It carries the whole island configuration, so opening it recreates the exact terrain with all your customizations. This makes seeds portable, shareable and reusable across projects.

How do I save a seed?

When you have terrain you like, use the save (star) action, give it a descriptive name, and save it as a .hmseed file in your seeds folder. The file stores everything: the base seed, all your slider values, the map size, and any islands you combined. File names are descriptive, so “mountain-archipelago-3k” is more useful than generic names.

How do I reuse or import a seed?

• Open the seed gallery: click the gallery button next to the seed field to see all your saved seeds with thumbnail previews. Select one to load that entire setup instantly.
• Import from file: drop a .hmseed file someone shared with you directly into your seeds folder (see Settings > Folders for location), or use the import button to browse for files.

Use cases

• Build a personal library: save every good terrain you generate. Build a familiar set of island shapes you’ve worked with in the map editor to speed up your future workflow.
• Share with collaborators: trade seeds with other map makers to collaborate on multi-author maps or to let friends iterate on your terrain.
• Iterate safely: save a seed before trying major slider changes, so you can always reload a good version if you want to go back.
• Version control: save different variants of the same base island with different slider tweaks (e.g., “island-v1-flat” vs “island-v2-mountainous”). Click the star again on an already-saved seed to save a new version with a different name, building a series you can compare side-by-side.