leilei, on 22 June 2013 - 12:48 AM, said:

It has a linear voxel-like appearance coming out of the floor. It'll crash if you get too close to the edge.
I also noticed music fading out and restarting as I traversed this area.
EDIT: apparently it's been part of Build since early 1994 and it is called "Groudraw" and it relied on heightmaps.


A convmap4/5/6/7 later on that world one, and in the latest Build test game... we see a slope!

Groudraws were retired for slopes.
Sector fields used for slopes: The useless groudraw fields, ceilingheinum and floorheinum, are now being used as the slope value. They are treated as signed shorts, where 0 is slope 0, of course. To enable slope mode, you must also set bit 1 of the ceilingstat or floorstat bits.
Looks nice on floors but I only saw it working with floors.
Yes, these things definitely look voxel-y, and they are very nice indeed

leilei, on 22 June 2013 - 12:48 AM, said:
Hmm, what about the fully 3D bridge in E1L01? I have no idea what it is made of, but it seems to have a different look compared to the "true 3D" objects in Dark Forces for example.