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It would be beneficial to me if I could create a surface from an equation, not axis symmetric. Is it possible to create a surface from an equation? For example z(x,y)=4*x^2+y^2 for 0<x<5 and 0<y<5.
z(x,y)=4*x^2+y^2 for 0<x<1 and 0<y<1 may be better