> Unless they want the scene to look the same and use new features.

#local Version=version;
#local Seed=seed(1);
#local NewRND=rand(Seed);
#version 3.6 #local OldRND=rand(Seed); #version Version

that should do it.  Advantages: no need for new keywords, and the 
possibility to use both the old and the new random-number generator in 1 
scene. Disadvantages: doesn't look as clean.

cu!
-- 
#macro G(b,e)b+(e-b)*C/50#end#macro _(b,e,k,l)#local C=0;#while(C<50)
sphere{G(b,e)+3*z.1pigment{rgb G(k,l)}finish{ambient 1}}#local C=C+1;
#end#end _(y-x,y,x,x+y)_(y,-x-y,x+y,y)_(-x-y,-y,y,y+z)_(-y,y,y+z,x+y)
_(0x+y.5+y/2x)_(0x-y.5+y/2x)            // ZK http://www.povplace.com

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