Thanks for your reply! I did a little test. I created a forest object with two variations of a tree. Both trees source objects have the same material assigned. They are different geometry variations but the same multi sub object material is assigned to each.
In forest pack geometry roll out, I drag/instance the material for one of the trees into the mat editor. I change the appearance of the leaf bitmap. Only one of the trees changes appearance. The other tree, even though it shares the exact same source material, remains un changed.
I want to be able to change all the trees that share the same material all at once not one at a time. I'm thinking that post I linked to above provides the solution. I need to clear out those auto assigned materials and then just edit the one source material that all the trees share.
Could anyone point me to the section(s) of the user guide that explains how materials work in this regard. I think it would help me if I understood the mechanics of how forest pack handles this.
forest Pack is the coolest and best thing I have added into my tool/skill set in a long time. Fantastic!