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In the CAS you should see the background automatically changes according to the background CC you have chosen.Click on NEW GAME and go to CAS (Create A Sim) mode.Launch the game and enable custom content under the GAME OPTIONS.My Documents > Electronic Art > The Sims 4 > Mods. Put that 1 specific file into your Mods folder.
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From all of the backgrounds that you have downloaded, pick 1 that you truly want to try.Download your favorite Sims 4 CAS background from this list.How do you change the background in Sims 4 CAS ? Then, download the CAS background file(s) into your computer. Find a curation post like this or go directly to a Sims 4 CC creator’s page and choose your favorite TS4 background. Start by googling Sims 4 custom CAS background. It is a mode within the game where players can design and customize their Sims’ appearance, personality traits, and other characteristics. CAS stands for “Create a Sim” in The Sims 4.
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