I noticed that another problem you're having is render speed? There was a post on the VuePro list that solved this problem in Lightwave (many thanks to Victor). I've found that it works at least as well with C4d. Pro exports the materials so that the leaf transparency ends up on the transparency channel in C4d (I guess that's logical). This really slows things down. Turn off the trans channel, and instead use the alpha channel. Set it to use the same map as the trans slider did. Be sure to turn off the 'soft' option as this blurs the hell out of it. Something else weird I noticed. Sometimes C4d sees the material map, but doesn't really use it (your trunk map problem, perhaps?). Just re-select the same map so the path is set. Then the texture should show. I don't think that's the problem in this case, tho. I'm hoping to show some example pics, but don't know when I'll get the chance to set them up. Til then, hope this helps.