- The slime*-based grayish metal bars on the top and bottom of the inner walls of the train (above and below the big bar of tekgren) are cut off by the floor and ceiling; if my eyes are judging the sizes correctly it should work out perfectly if you made a custom version of that texture that used the 16-tall versions of the gray metal bars, instead of the taller ones, so they fit nicely to the height of the sector instead of going into the floor/ceiling. The same goes for the 16-tall border on the top of the train.
- The step5 border on the ceiling lights in shot 1 could have its ceiling moved up a few units so that the strip of tan lights (or whatever the heck those things are supposed to be) isn't vertically cut off midway.
- I can tell too easily that the railings that surround the train are flat. (I mean, of course they're flat, but it shouldn't be that obvious.) Possible ways of dealing with this are curving their corners a bit, and/or adding 8x8 solid raised-floor poles at its ends and/or corners so that you can't see its paper-thin edges. Or something else. I dunno
Great work again, your overall style reminds me a lot of RTC-3057.
And I think either the stone or marble would be best. A wooden table could work, but probably not using Doom's wood textures...they're not very fitting for this, and there's also the fact that we're all too used to seeing them in gothic/demonic settings, so they stick out and don't look right.
