Rotate (group) objects outwards on spherical particle system? I'm trying to create a mini-world with (among other things) trees on it. I have created an icosphere, modeled several trees and put them in a group.
Next I added a particle system to the sphere, and chose hair. In the "render" section I selected Group and the name of the group I created. As expected the trees show up but they're all oriented in the same direction, while I would like them to pop up just like the default hairs do (along the normal of the individual faces).
I tried fiddling with all kinds of settings, had them oriented in all kind of ways (e.g. towards the "north pole"). I also tried using the emitter instead of hair setting but without success as well.
For your hair particle system, just click on the button Rotation in the render panel of the particle settings.



Then make sure your objects are pointing towards the X axis. Other wise all your trees will point out from your planet, but they will not be pointing up.
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