The original files are often hosted on platforms like Patreon or SimFileShare under the creator name Noir and Dark Sims . The "iLLusion" Decorative Collection
If your goal is a magical or ethereal "illusion," the collaboration on The Sims Resource is a massive collection of fairy, witch, and fantasy-themed room sets. ts4 - illusion room set
It is widely used in conjunction with specific pose packs . For example, there is a dedicated Illusion Room Pose Pack containing 14 unique poses for adult male and female Sims that require these props to function correctly. The original files are often hosted on platforms