### use a colormap for implicit_plot3d

Here's a question I asked a while ago on sage-support, but never got answered, so I'll try it again here:

I've been trying to figure out how to plot a surface using
`implicit_plot3d`

, and color it according to a particular color map. I
see that `implicit_plot3d`

passes its arguments to

`sage.plot.plot3d.implicit_plot3d.ImplicitSurface`

but I can't figure out more than this . . . when I try

`sage: sage.plot.plot3d.implicit_plot3d.ImplicitSurface??`

I get

`Error getting source: could not find class definition`

and then a few more unhelpful details.

It seems like the two possible viewers are jMol and Tachyon, but I
can't tell whether either of these support color maps.

Any ideas where else I should be looking?

Update: This is now Trac ticket 12212