"esfoster" <nomail@nomail> wrote:

> I want to add a color to them based on their size. e.g larger particles green
> and smaller particles blue and there would be a gradient assigned to fill the
> particles in between.

divide the radius of every sphere by that of the largest sphere, that gives a
value between 1 and very small. The range depends on the sphere variation. Use
the value you get as an index to pick a colour, as jr suggest from a spline.

or use one of the interpolation (lerp) macro's to find an index between 1 and
zero from the radii.

ingo

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