Plot3d1 with spheres in diffrent colors, how?

[Constellation Athome]

Hi there,

I would like to give each sphere in my plot3d1 plot a different color so
that I can distinguish them better.
I played around with
http://help.scilab.org/docs/5.3.3/en_US/plot3d.htmlbut couldn't find a
way to change it to rgb colours or whatever, to have a
red, a green and another colour.

It would be great, if you could help me.
And another question is, how to add opacity so that they will be
translucent.

Thanks in advance,

Andreas
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