> I'd like to have a "semiorthographic" camera, i.e. one that is horizontally 
> orthographic but vertically perspective. This is similar to cylindrical 
> projection, type 4 ("horizontal cylinder, viewpoint moves along the 
> cylinder's axis") except that is shouldn't be projected onto a cylinder but 
> onto a plane.

Somebody, I think it was ABX, wrote a patch for user-defined cameras.


-- 
merge{#local i=-11;#while(i<11)#local
i=i+.1;sphere{<i*(i*i*(.05-i*i*(4e-7*i*i+3e-4))-3)10*sin(i)30>.5}#end
pigment{rgbt 1}interior{media{emission x}}hollow}//  Mark Weyer

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