> I think you need to add an extra step
>
> #declare Snow_Pig_Turb = pigment{bozo color_map{[0 rgb 1][1 rgb .85]}}
> #declare Pig_Function = function{pigment{Snow_Pig_Turb}}
> #declare SnowFunction = function{Pig_Function(x,y,z).x}

Thanks, this works nicely. Should have come to that conclusion by myself,
but once you get someone telling you how to do things, you trust them... :-)

-- 
"Tim Nikias v2.0"
Homepage: <http://www.nolights.de>

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