3D Projection Mapping involves shining and aligning projectors on the different surfaces of an object. Here are a few videos showing what can be done:
Published on Apr 30, 2018. Cream Studio was behind an impressive show to projection map the Galata Tower to advertise the Istanbul Genclik Festivali. The company used eight edge-blended Christie Roadster projectors to turn the historic building into the canvas for the show.
This one is on the White Knight in Kosice.
Here’s a lighthouse show.
Projection mapping can also be done on moving objects as this video shows:
Given that, what could be done, UFO-wise, with projections onto a floating blimp? Don’t trust everything you think you see.