Random streaks in model help?

Last night my model was fine, I was able to do some test renders in vray. Slept, woke up when I opened it again this happened. Cant figure out whats wrong. My other model was working fine but this I cant seem to figure out.

Graphics card driver update by Windows last night? Upload your model so others can check it.

Large model extents? (model or parts of it far from origin)
Back edges are turned on?
Hidden geometry and /or hidden objects are turned on?
Post the model.