Hi all,

I have a somewhat silly question about metapost/metafun. To emphasize  
parts of a picture, I place a bright red arrow or circle/ellipse on  
top of the picture. I would like to make this arrow more visible by  
putting a shade beneath it (I attach a jpg that will hopefully show  
the desired effect). Right now, I simply draw the arrow twice with a  
transparent black color, once with a smaller pencircle, so the effect  
is like a shadow that is darker in the center than at the edges.  
However, I think the effect would be more dramatic if I could have a  
transparent area with a smooth grading. Is this possible at all in  
metapost? filling a path with a transparent AND shaded color?

All best

Thomas