I have just started working with Infraworks. I find it very promising, although quite buggy. I have managed to import this model of a road (yes, it looks a bit weird but that is unrelated). When I rotate the view it seems as if the shaders do not function properly, and the model becomes completely black. See pictures 1 and 2. I am also able to reproduce this effect by moving the sun by changing the time of day, and keeping the view in the same place. So this has probably something to do with lighting or shaders. Has anyone come across this problem before?