Example of a procedurally generated level/environment made using a random walk algorithm implementation. The process was done in Blender + Python. Contains no interior walls that are not also exterior walls.
The source code for how this was done is here https://github.com/aaronjolson/Blender-Python-Procedural-Level-Generation/blob/master/random_walk_via_cube_placement.py
and a video for tutorial on the process is now published https://www.youtube.com/watch?v=29SxDeGFLfk