Legacy:Map Filesize - Unreal Wiki

# Legacy:Map Filesize

### From Unreal Wiki, The Unreal Engine Documentation Site

The average filesize of maps has rocketed since the release of UT2003.

Some tips for reducing the size of your map:

- set all unseen BSP surfaces to unlit (those completely behind static meshes or terrain)
- set bsp surfaces where shadow detail is not needed to 256
- rebuilding lighting with DXT1 compression
- compress all (custom) textures that don't need an alpha channel to DXT1

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