I've been giving this a run and I'm real pleased with the arrangement so far. I'm new to Tg2 and Xfrog but my use of them has been seamless so far. I'll mention the SWF tutorials included on the first DVD are solid starting points to getting into the TG2 interface, working with shaders and populating a scene with Xfrog trees as well as billboards. The tutorials are using an older version of TG2, but the layout and editing parameters are easy to follow and give immediate results - well not including renders
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On the subject of tutorials. I have word that these tutorials will be made available soon, free of charge to stream. Being new to TG - one can never have enough tutorials. I think these will give a better idea as to how Xfrog plants integrate into TG2.