Saw this on tv around the early 90s. Seemed to be a sci fi movie. The only part I remember took place in a brightly lit, round white room (reminiscent of the inside of a mushroom cap) The protagonist(?) is some kind of armored soldier I think, and a giant bug is crawling around the room chasing him. I think the room had 2 levels, or an upper walkway around the edges.
Sounds like one of my alltime childhood favorites. The Dark Crystal (1982)
Best Jim Henson Film, of all time, ever!