Has anything changed in regards to images and their planes? Our (SS13, ofc) codebase is having a weird problem with the AI's visibility. Basically whatever is out of sight is applied an image to break their line of sight with the turf. This seems to have stopped working until I reset the plane from 2 to 3 and back to 2. From then on its back and working.
Here is an image; I have set the ones that are visible manually from plane 2 to 3 and back again. Which made them re-appear:
I have downloaded 512.1406 which shows everything correctly:
So I believe the issue was introduced in the latest patch.
Feb 14 2018, 5:10 am