I think your tree looks great Alvin! I recently did a scene with a lighthouse and it got good ratings, but something about it bugged me. Leave it to my cousin(a non-artist) to state the obvious,"your trees are too perfect, trees on a bluff above the sea should be ragged and windblown". She was right! I tried every trick I knew, but I couldn't get the treelab to produce a gnarly coast tree with a lot of branches missing on one side. I'm not saying it can't be done(always dangerous when talking about Bryce!)but I have not discovered the secret.
I decided to model some tree trunks in Wings3D and then I added treelab trees with "invisible" trunks for the foilage. I think they would look alright for background trees.Just another technique to consider perhaps. Bryce4 artists could substitute terrains or lattices for leaf clusters.