Blocking NPC vision

[IrocJeff]

I have 4 really large cylinders setup as giant vats setup in one room and have some stormtroopers in between and around them. Sometimes the stormtroopers appear to see me or follow me when I duck in between these tanks and sometimes they shoot at me. This happens even though we're blocked by one tank.

 

Any way to block the NPC's view through the cylinder?

[Xycaleth]

It's a bug in the npc code. They'll track you through the whole map until their timer runs out I think.