> The macro systems are very good for creating shadow objects (objects that
> will never actually be seen by the camera, but that produce shadows for
the
> scene), but even the best of them fail to make natural deviations in
trunks
> and boughs.
>
> Very seldom in nature is a trunk/bough smooth and regular. You can imagine
a
> trunk may appear as a cone slowly dimishing in span as it rises. However,
> there are irregularities in the span that are impossible to reproduce with
> normal statements.
>
> What I have in mind is creating an irregular trunk with a few visible
boughs
> and such. These will be supported with 'fill' shadow objects.
>
> So, does anyone have any ideas on how to proceed? :)

It may be slow but I would try it with one of this macros which create a
tree with cones and cylinders and instead of using this objects to make the
tree use just one isosurface.

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