Invisible road

A large percent of the time when I let the part finder take me to the track to race. When the scene comes into view the only things I can see for a track are the walls with blue or yellow lines, special track features like the nitro boost, and ramps, and other cars. The track and background stuff like tunnels are invisible. It's like racing in mid air with no way to see where you need to go. This is ruining the game for me. I refuse to pay money for things like gold, gas or any of that so every bit of fuel is precious. Every time I pause because of this problem I lose the gas points even if I don't race. So the game is basically ripping me off! Please fix!