I have an issue where as the camera moves, one of the 3d models in my scene does not display correctly. As the camera moves different parts of the model turn black on a frame by frame basis and on some frames the entire model is black and on others it displays correctly. In trying to narrow down the issue I have found that this only happens when there is any light other than ambient in the scene. The other observation I have made is that when I turn off another model in the scene, the problem goes away even though the two models do not interact directly with each other. The glitchy model is a table (inside a 3d model house) and the geometry is very simple and is not using any proprietary modifiers. The model that seems to be affecting it is the grass lawn (outside the house) and although it is more complex by nature, I made it myself and it is as basic as it can possibly be.
Any ideas on what might resolve this issue would be most welcome!