A 4D movie theater's back wall displays vivid projections.
A low-angle view of the back wall of a 4D movie theater. There are bubbles floating throughout the image. There are two windows to the left of the middle of the image, each window has one projector in it, both projectors are on and projecting light through the windows. There is a dark gray curtain to the right of the section of the wall with the windows and projectors. There are black metal beams underneath the ceiling visible at the top of the image. There are multiple light fixtures attached to the beams shining light over the curtain and the wall as well as the bubbles floating throughout the image.