Yeah it's an old project so it looks like crap. The yellow squares are actually invisible tiles set to impassable. I would remove the yellow box from the chip before release. This was to get past the 1 tile limit on ceilings.
Alternatively, you could just make a virtual reality chair that the character coud "jack" into. Or booths.
Having a program that stimulates your senses and nerve centers sounds a lot more feasible than a room that combines holograms with force fields into human shaped characters, blah , blah, blah.
I think they're only ridiculous in the case of Star Trek because they go to great lengths to explain the science in order to make it sound feasible. Not really important.