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Grunge CAS Background is a default replacement, and it turns the standard CAS screen into a cluttered, alternative bedroom. The room comes with a black-and-white checkered floor, band posters, wall art, clothing racks, a guitar, speakers, plants, string lights, and plenty of grungy decor. It’s a great backdrop for punk, goth, emo, and alternative Sims, especially if you want your CAS screenshots to have more personality. The creator notes that the colors may look slightly different if you don’t use the same ReShade settings. This background is compatible with the base game.
Follow these steps to install Grunge CAS Background on your Sims 4 game:
Download the mod file from the link above. Sims 4 mods typically come as .package or .ts4script files.
Open your Sims 4 Mods folder. The default location is: Documents/Electronic Arts/The Sims 4/Mods
Place the downloaded file directly into the Mods folder. You can organize mods into subfolders up to one level deep.
Launch The Sims 4 and go to Game Options > Other. Make sure "Enable Custom Content and Mods" is checked.
Restart the game if it was already running. The mod should now appear in your game.
Important: Always back up your save files before installing new mods. After Sims 4 updates, mods may need to be re-downloaded or updated by the creator.
Platform
The Sims 4 (PC/Mac)
Pro tip: If a mod stops working after a game update, check the creator's page for an updated version. Broken mods can cause the game to behave unexpectedly.
Created by
Unknown Creator
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Published
August 27, 2026
Source
MustHaveMods.com
Last Updated
September 24, 2026