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The textures are actually quaded with the branch being in the upper-left quad, a full picture of the tree (for long range viewing) in the lower left, and a trunk texture occupying the entire right half. They're very hard to work on, and to alpha, so that the tree model applies the texture properly and looks remotely correct.
If you want to experiment, contact me inworld and I can drop a couple of keys on you for one's I've made. You simply substitute the keys for the default Linden ones in your trees.xml file and view your world reflecting your imagination instead of theirs. That said, yeah it would be nice if we could just apply textures to the models and if we could link, tint, et al those models just as we do other prims. A couple of nice templates and appropriate "preview as tree" entries in the image upload dialog would likely be a good start.
I think you are waiting for the SpeedTree project, Linden is (..was..) working on. It look like that it is on hold since the 'stability' over 'features' decision.
http://wiki.secondlife.com/wiki/Render_Roadmap You can also read about a speedtree discussion here: And more to find here: This is completely independant of Speedtree.
Speedtree has been "coming soon" for over 2 years. It's going to take more than a change from stability to features to make it happen unless Linden Labs buys the company and makes Speedtree GPL. VWR-303 could be implemented within a month, and doesn't need to wait for Speedtree. |
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See VWR-303 for a possible implementation that takes this into account, and could be tested in the Open Source client.