> I would use CSG. The way I would try it is to use heightfields.
> Fortunately you have only two colours. So separate your image into green
> and red images. Change the white to black and get rid of the
> transparency. Then reduce the colour depth to two colours, black and white.
>
> Create a merge of a heightfield and one of the images. That should give
> you one of the shapes. Do the same with the other image.
> You can use the water level in the heightfield to remove the base.
> You will end up with two objects that are open. To close them place a
> scaled copy (very small in one dimension to make it thin) of the merge
> as an end cap.
>
> It may sound complicated but once you have got the idea. It is quite simple.
>
>
> --
>
> Regards
>      Stephen

Like I said, this example PNG is very simple, 2 colors indeed.
But I have others with many colors, more complicated shapes, not so easy to
separate colors/shapes.
Also, heightfield does not produce the quality I need, I used them a long time
ago and they are not very smooth and sharp.

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