>  If the tree is a #declared triangle mesh, then instantiating (with the
> 'object' keyword) is going to save memory because the triangle data will
> be stored in memory only once. For other objects this is not the case.

Thank you, Warp. This is exactly the answer I was looking for.

In terms of processing speed, are there advantages to SDL over meshes?

I once built a wall out of bevelled stones (take one box for the stone, use 
difference of 8 rotated boxes to bevel the edges). Then I wrote a macro to 
build a wall out of these boxes, by putting one above the other like a mason 
would do. Would it have been smarter to use a mesh for the bevelled stones?

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