Thanks for your quick reply
I think it might be a problem that I've used too dark tint on my materials. I got it a bit better when reducing the tint level.
One other problem that frequently arise when playing around with this, is that exposure and some other settings in Enscape causes revit to hang for a period of several seconds.
Some times it is quick to respond, some others it is a pain to move sliders within enscape settings. I havent really been able to pinpoint the cause.