Ideally we dont want to see thru your vehicles windows to see what's on the other side as once it gets loaded into the wheel simulators your photos background will clash with the simulator background.

Few ways to get around this.

Tint your windows. take the photo against a dark background like foliage from trees or a dark concrete wall or rolla door. (Always easy to find in industrial estates)if your photoshop savy, tint your windows in photoshop before uploading to vrimz

Or spend more time removing the background thru the windows in the vrimz image cut out tool. You really need to zoom in a long way and use the smallest brush to get to hard to reach places. Remember Ctrl + z is keyboard shortcut to undo.