Blending Demo Controls:

up/down arrow:		vertical spin
left/right arrow:	horizontal spin
	
'a' key:		pause animation
'f' key:		freeze animation
'r' key:		reset to defaults
			
'b' key:		reduce blending effect
'B' key:		increase blending effect
	
's' key:		toggle shading (smoothness)
'w' key:		toggle wireframe