Indicates the state of the opacity of background bitmaps (such as maps).
If set to 0 (false), then the background bitmaps are drawn onto the background as transparent backgrounds (default).
If set to 1 (true), then background bitmaps are to be destructively drawn onto the background (opaque).
Note: It is recommended that you set OpaqueBackground to 1 (true) for faster draw times.
Default: OpaqueBackground = 0