[gradsusr] How to plot two different SHADED fields?

[Mireieta]

Hi grads user,

I have two different fields that I would like to fit together in a
same plot and shaded both (obviously with different color scales). It
could seem a bit odd, but just think about two fields that I don't
want to plot them below some level, and the highest levels of the two
fields don't coincide too much in the space. So, I could be able to
shade both fields if there was a tranparent color. But the alternative
I found to shade a transparent color is to chose the background color,
but in that case, the second shaded background color field prints
everywhere and erase the colored regions of the first field...

I tried with "shade2" and "shade2b", but these options just plot
contours, not shaded...

Anyone has and idea how I can do that?
Thank you very much!

shadedgirl

-- 
Mireia