Let me explain what I mean by “seen twice”. We’ve got a bunch of scenes all independently lit and saved. In the main scene we’re bringing in the scenes with LoadLevelAdditive then randomly positioning those scene objects to make up the dungeon. This all works fine and dandy and the lightmaps behave. That is until two of the same scene object happen to end up on screen together (placed next to each other and you see both while moving between them). When that happens the lightmap pops on and off of one of them depending on where you’re viewing it from.
Any ideas on what could be causing this?
I’m getting the same behavior. Did you ever sort it out?
Afraid not. I suspect it has something to do with how the light maps are getting packed together and the indices fighting each other, but the biggest problem is that I can’t really get it to happen consistently to test on my machine. I’ve seen it happen before on the console and a few times on other peoples pc.
Ain’t it always the way that the one who needs to fix it can’t actually get it to happen 
I only get it when I run my game on iPhone. It’s a racing game where city blocks are placed randomly ahead of the car. After a few blocks the light maps on the roads start flickering.
The flickering goes away if you turn off batching.