Boundaries of objects have unattractive black pixels

[andrewjworz]

I am using Xfrog tree models in Vizard (.3ds format). Once the objects are loaded into Vizard 3.0, there are ugly (unrealistic) black pixels at the boundaries of every leaf.

How can I change the color values of the pixels which are on the boundaries of the object so that they are some kind of an average of the pixels from the leaf and of what is in the background? Is this something that can be done with the alphaFunc()?

Andy