I have 2 full baths & am considering removing 1 of the tubs & building a shower in its place . The question I have is , does anyone make 4x8 sheets of waterproof material that would be suitable to glue to drywall ? I was thinking of a finished product with some type of pattern , tile , brick , rock , ect . If so is inside & outside corners available ? Maybe corners with slots for the wall panels to fit in . Am thinking about purchasing the floorpan & building the rest .