@Wesbat thanks! I’ve managed to find the somewhat hidden mapchecker in SLADE and found the issues you mentioned (and more!). I even installed zdbsp for node building, you spoiled babies. Back in my day we pulled out a pencil and paper and built our nodes by hand each time we wanted to play a map.
I just played through the map in chocolate doom (where the fov is slightly different to gzdoom’s default, making the claustrophobic sections even more so), and all seems OK to me.
(edit: I guess the nodes weren’t in the wad. I’m not sure how this works but *this* wad definitely plays for me directly in chocolate doom)
Updated wad: https://thomaspurnell.com/notes/voxel_e1m2_20250320_2.wad
