Example of AI friendly building. AI can reliably enter and exit this building:
{F35583}
Example of AI unfriendly building. AI are unable to enter this building. Note access to the door is clear, but vegetation along side walls causes AI pathfinding failure.:
{F35584}
Marker objects are automated AI building exploration script. Note that access to the door is clear for both, and terrain similar. Presumably the vegetation and objects around the side walls of the AI unfriendly building cause the AI pathfinding failure.