From attractionsmagazine.com:
The Haunted Mansion at the Magic Kingdom recently received several major updates. However, despite being open for over 4 months since the refurbishment, tweaks are still being made inside. The latest update is a significant improvement to the singing busts in the graveyard scene.
No longer do their faces glow, clearly revealing the secret behind the effect. Now, the busts are wonderfully evenly lit, full of detail, and are quite realistic:
As you can see from these before and after video stills, the “old” busts had bright faces with dark stone surroundings, while the “new” busts don’t obviously separate the moving face from the non-moving stone parts. In order to make the busts more evenly lit, the area surrounding them is not as bright as it once was. However, it is a bit lighter than what you can see in the above “after” still image.
Be sure to check out the video of the “new” singing busts below.
