Removing unused lightmaps after level unload

Questions & Answers
1

I’m building a large explorable area for a game I’m working on, and I’ve got small sub-level chunks that load in and out using LoadLevelAdditive and Destroy. But I noticed that when a chunk gets destroyed, its associated lightmaps remain in the index, and if that chunk gets re-loaded again (like if the player were to turn around and go back), it loads the lightmaps for that scene into the index a second (or third, or fourth, etc…) time.

Is there any way to run a script to remove associated lightmaps from the index during runtime, something that’d be run before the Destroy, to avoid this from happening?

2

To get rid of all the lightmaps in the array you can use:

		LightmapSettings.lightmaps = new LightmapData[0];
		Resources.UnloadUnusedAssets();

If you wanted to keep a certain base set of Lightmaps, you could probably make a copy of LightmapSettings.lightmaps before you load any extra areas. Then assign that array whenever you need to.

3

LightmapSettings.lightmaps = null;

my solution