The secret history of the Haunted Mansion's hall of changing paintings

Disneyland's Haunted Mansion sports a hall of changing paintings in which people and scenes are transformed into sinister versions of themselves. Though these have gained in technical sophistication over the years, transitioning from rear-projection slide-fades to crisp electroluminescent effects synched with the lightning in the opposite windows, the core graphic concepts have been largely invariant since the Mansion first opened its doors. (more")