That win topo program worked great!

many thanks to everyone who replied

G'day everyone,

Just wondering if there was a plugin for "finding" the edges of an imported png file with transparent areas. I draw my own trees and import them as png, but in order for tem to cast a shadow I have to trace them which takes forever, even if I do it first in autocad. just wondering if there was a plugin that located the non-tranparent areas and created an edge.

-any help would be great, cheers