add option (default) for more robust (but slower) hit detection
add option (default) for more robust (but slower) hit detection

walterbender/turtleartmini,AlanJAS/turtleart,walterbender/AmazonasTortuga,walterbender/turtleflags,walterbender/turtle3D,walterbender/turtleart,walterbender/turtleconfusion