This one is strange. I have spent close to 7 hours building two cars, and all of my work has ended to no avail. I have attached screenshots of the second car I made. They feature a photo scene stuck to a car in the photo scene and in the beamng export screen. It is hard to exactly explain this issue, however this is be best I can do. To produce the issue seen in the screenshots, I entered the photo scene with a completely different car and tried to switch scenes, attempting to find a good shot. I guess I did it too quick or something, because the screen went black. I clicked the save button(because it was still there, just the background wasnt), and reloaded the game. After loading back in to continue on with the photoshoot, I realized that there was a photoscene.. inside of another photo scene. So, I left that screen, and went to export, assuming there were no problems. Then, I see my car hanging out of a photo scene in the beamng export screen. I am sorta panicking now and decide to export anyway, expecting the worst. The export finishes and I load in the car. The back end is floating and I can not move (until i switch to 4wd because front wheels are on the ground). I proceed to drift on my front two wheels. I then decided to do it again. Make another car, and try again. Same issue. I am going to try changing from and back to the beta. (which I am on, probably should have mentioned earlier)
note: i had created two cars earlier and it worked just fine.