Grey/fogged frames - lighting problem?

[anthonyfoster]

Hello all,

 

I'm working on a supermarket interior walkthrough and I'm getting a strange effect every few frames as the camera moves along its track. The attached consecutive frames show this and I've tried a few things like blocking out light sources and adjusting render setting with no luck. Anyone hazard a guess at what's causing it or seen something like it before?

 

I'm in the process of changing the ceiling lights and if anyone has any suggestions on what type they should be are very welcome.

 

Appreciate you might need some more info on the rest of the scene so please ask away!

 

Cheers,

 

Anth