"Chris R" <car### [at] comcastnet> wrote:

> Getting a different texture on the bottom and top of the leaf is a little
> trickier, but can be done by splitting the leaf shape function in half and
> applying a different texture on each half.

I haven't modeled a prototype leaf isosurface yet, but I was wondering:
If the leaf is "extruded" across the x=0, y=0 plane, then I suppose that the
isosurface values could be negated for the entire half of the leaf on one side
of that plane.  Then you could just specify texture and interior_texture to get
both sides of the leaf.

- BW

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"Bald Eagle" <cre### [at] netscapenet> wrote:

> If the leaf is "extruded" across the x=0, y=0 plane, then I suppose that the
> isosurface values could be negated for the entire half of the leaf on one side
> of that plane.  Then you could just specify texture and interior_texture to get
> both sides of the leaf.

Yep, it works.

These are just prototype leaves, but it shows that you can flip the sign of the
isosurface and thereby get different textures on each side.

Left leaf is the isosurface, and right leaf is the same isosurface scaled by -z.

I'll have to think about if there's a way to bend the leaf but still retain this
effect / feature.

- BW

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Preview of image 'isosurfaceleaf.png'

"Bald Eagle" <cre### [at] netscapenet> wrote:
> "Chris R" <car### [at] comcastnet> wrote:
>
> > For these, I found an interesting 2-D polar function to start with and started
> > playing with it to get the edges I wanted.
>
> So, presumably you're doing something like this:
> https://math.stackexchange.com/questions/1587947/the-plot-of-a-leaf

Yes, although for the scene I referenced the leaf was much simpler.

-- Chris R

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