Several years ago, immersive experiences showcasing popular artists such as Prince and Vincent van Gogh began popping up around Chicago, putting life back into the streets and filling once-vacant storefronts.

       It was unclear whether immersive-style attractions, which allow guests to interact with the exhibits around them, were a passing fad or here to stay.

       But most are still going strong, and today they represent one of the brightest spots in the Loop’s retail sector.

       The Museum of Illusions Chicago, an interactive exhibit that presents dozens of optical illusions, just signed a deal expanding into a vacant storefront next to its location at 25 E. Washington St. in the Loop.