I've been told that a lot of people have been having problems using the OBPs - out of memory errors and Bryce crashing, etc. I don't think it's down to the trees in particular, more probably just the fact that adding / removing OBPs can be tricky. So to bypass the use of OBPs I've uploaded the original Bryce 5 scene files for all of the trees to Google Drive - you can get them here: https://drive.google.com/open?id=1tVTt4eyhZ3587pkqrGAx-_9vjSVH7bJO There is a big zip file for each of the sets, or if you just want to download the files for specific trees, there are also individual zips for each tree.

I'm really pleased that you are are enjoying the trees - much better to have them used out there than sitting unused on my hard drive. Also many thanks for all the kind comments. I've uploaded the last part of the tree collection (2D trees), so that should be appearing in the Freestuff in the next 24 hours.