Anyone know whats causing the white artefacts here?
Not sure, but I would try to increase Material Sampling in render settings.
I’m not sure but I had similiar situation with interiors. Some white blurs appear on my visualisation.
The problem was with texture in UV maping on one of model I used in scene. After changed in ortogonal maping everything was ok.
Please look in this:
http://forums.abvent.com/t/renderings-error/880/1
BR
Artur
Fixed the problem by deleting a rogue object.