This same issue is happening to me on a single frame, Example I am using the NWDA public default project, @ the scenes set camera position, it renders clean, as soon as I move the camera I copy current view to camera, and the image will render black, (I am not under the terrain or anything like that) this happens from time to time on my machine with other projects as well. What I have done in the past is copy the entire project as a clip and insert it without the cameras and renderers & I use the existing cameras etc in the new tgd, this seems to work, this doesn't work inserting new cameras into the original tgd, obviously this is a pain in the @ss, last thing I tried was uninstalled and re installed of tg hoping its some sort of bug, nope same deal. Any clue whats going on here ?
Clean render default camera position