Marc Davis’ concept art for a Haunted Mansion gag that was never used.
Tokyo Disneyland Haunted Mansion Maid And Butler Costume Illustration
Original “Haunted Mansion” concept sketch by Rolly Crump, deemed by Walt Disney to be too occultish in nature.
Not quite true - this was Rolly’s Museum Of The Weird, cobbled together after he did a bunch of sketches for the haunted house project and he didn’t know what to do with them - Walt deemed them ‘really weird’ at first, then came back and suggested a pre or post-show waiting area for the ride to be filled with Rolly’s designs. He loved the ideas and did not dub them too occult-based or bizarre - he just had to figure out a way to use them where they would be best suited after seeing them and how strange they were.
After Walt’s death, the rest of the design team largely focused on building and finalizing the ride portion and the Museum was neglected, save for some stray designwork sneaking into dark corners (the eyeball/face wallpaper, the ‘Donald Duck’ armchair, the wall sconce arms).
Visual development for the Haunted Mansion ride by Marc Davis
Rolly Crump explaining the “Museum of the Weird” attraction. In one concept for the Haunted Mansion, the main walk through (this was prior to Doombuggies) would take guests through the mansion, while a spillway area would house the Museum of the Weird. The queue would go through the Museum of the Weird, letting guests experience the effects. Other plans called for the area to be a themed restaurant like the Blue Bayou.
Rolly Crump worked with Yale Gracey on a number of the practical effects, including the organist above. After Walt’s passing the Haunted Mansion project was reworked and the Museum of the Weird was removed. Some of the effects that Crump and Gracey were still used for the final attraction.
You can read a great article on the Museum of the Weird at Doombuggies.