hey GT_4, you've got the right idea for lowering the car but there is one thing that you need to do differently. Instead of copy and pasting only the car itself you should C/P the bottom of the car, not including the wheels, and include everything above that in the selection. Check out the pic, the red line is where you should make your selection, after this selection jus C/P it and lower the second layer. This eliminates the "old" car showing through.
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