Corrected entry: As the hologram of Captain Maddox walks toward Burnham, it steps up the steps, complete with reflections on the floor. Maddox would be in a hologram projection chamber with no steps, let alone a reflection, and no steps.
Movie Nut
21st Jan 2018
Correction: First of all, there is nothing in the show that indicates "projection chambers" are used. The holograms appear to be generated from bridge so any interaction would match the room they are in. As for the reflection, the hologram doesn't produce the reflection. The floor is reflecting the hologram.