I've been using crackle to make randomly placed armor plates, but I also
need to have one plate in a specific location, and have it not overlap
any of the random plates.  What I'd like to do is something like this:

#macro my_pattern (V)
max( crackle (V), spherical (V) )
#end

#declare my_texture = texture{ my_pattern texture_map{...}}

Is there any way to do something like this?
    John Chatham

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