easy way for terrain map?

[3dcamper]

Is there an easy way to create terrain for tesseract/sauerbraten? What I mean is shown in the video at the link. I made this map for doom 1/2 (for the k8vavoom port) in blender 3d editor, saved it to an obj file and converted it to UDMF (universal doom map format) using Ultimate Doombuilder. Is something similar possible for tesseract/sauerbraten?

https://media.mas.to/media_attachments/files/110/106/311/012/646/171/original/5d91f3b9d68cba73.mp4