raster symbols.

[Bob Basques]

All,

I've added my very first set of raster symbols to a layer.  The symbols 
are PNGs with a transparent Background.  While the resulting image has a 
nice transparent background overall, I noticed that the drawing of the 
Symbols where they overlap, that the original BBOX of the symbol graphic 
is overwriting the previous symbol of the same type.

Question, is this something that I have to live with or is there another 
approach to getting the transparency of the raster symbols to stay 
transparent where they happen to overlap in an Output.

Up until this time, I've either drawn my own symbols or used TrueType 
versions.

Thanks

bobb