I just realized something interesting. Build a scene and save it and you will find the .car to be close to 3 times the size of the elements that make up a scene.
Why would saving as a .car almost triple the scene size?
Example. I have a simple scene, 2 objects, 2 textures. the folder they are in is 18meg. Load those elements to a scene and save as a .car and the .car is 58meg. :bug: