Prefabs

A prefab is a reusable entity asset stored as .slprefab. Use prefabs for objects you want to place repeatedly or spawn at runtime: enemies, pickups, props, lights, triggers, reusable gameplay objects, and similar content.

Create a prefab

Select an entity and use Create Prefab from Selected. Choose a location under the project's asset root.

The prefab stores the entity's component/script state as reusable source content. The prefab does not own the scene object's ID; every instantiated copy receives a fresh stable entity ID.

Instantiate in the editor

Find the prefab in Project / Assets and choose Instantiate Prefab, or use the normal asset/editor placement flow. Instances remember their prefab source until unpacked.

Apply, Revert, and Unpack

For a prefab-backed entity:

• Apply to Prefab writes the current instance state back to its prefab source.
• Revert from Prefab reloads the prefab's source state into the instance.
• Unpack Prefab removes the prefab-source relationship while leaving the entity in the scene.

Use these intentionally. Apply changes the reusable source; Revert discards local instance edits in favor of that source.

Spawn from C#

var enemy = Prefab.Instantiate(
    "prefabs/enemy.slprefab",
    new Vector3(5, 0, 3),
    "Enemy");

if (enemy is not null)
    enemy.Tag = "enemy";

You can also instantiate from an AssetReference.

Moving prefab assets

Prefabs participate in the stable asset-reference system. If scenes or other assets reference a prefab, use Move / Rename… from the Project browser so Vespera can preserve the asset ID and repair fallback paths.

Before deleting a referenced prefab, run the editor's delete-safety check. A stable reference surviving a move is preferable to discovering a broken package at build time.