>This result could be less tight; for example, if you had a long corridor with many side rooms, and that long corridor was a single cell, then in Quake it would always try to render all the side rooms, whereas Thief would only try to render the entry cell to each of the side rooms (since those cells would always be adjacent to the corridor and visible), but Thief could cull the rooms themselves if they weren't curren…
That's quite interesting. I wonder why visual culling on PC appears to have been much more primitive than culling on, say, the Nintendo 64. Some games there seem to dynamically cull every single polygon not in sight. For example, Banjo Kazooie: https://m.youtube.com/watch?v=se6y5we3p2I
When a scene contains a truckload of triangles, culling them all one at a time like that does not win you as much performance as you might think. You always needed to do additional things on top of it.