scratch a figure

Hi,
I have generated a figure using rgl.surface(),how can I scratch this 
figure? thanks a lot.

Which version of rgl are you using? Current is 0.65. What does "scratch" 
mean?  There are functions rgl.close(), rgl.clear(), rgl.pop().  You can 
also just close the window; a new one will be created the next time you 
draw something.

Duncan Murdoch