cos(x)*cos(y) a Ghost

(1cos(x))*(1cos(y)) a Crypt

cos(x*y) Waves around a Cross

1/sqr((x+1)²+y²)1/sqr((x1)²+y²) Equipotential Surface

cos(x²+y²)/exp((x²+y²)/4) the 'Blupp'

sin(1.25*s)+0.48*sin(3.75*s) a Hat

cos(atn(x/y)*sgn(y)*8.0)/4*sin(sqr(x²+y²)*3) a Red Rose

sqr(abs(1abs(1abs(1abs(x*y+0.5))))) 'Carves'

(1cos(x))*(1cos(y)) two cosine hills

cos(sqr(x²+y²)) 'Loop'

cos(log(sqr(x²+y²)/30+0.001)) 'Peak'

abs(sin(4*x)+sin(4*y))/4*cos(sqr(x²+y²)*16) 'Ripples'

Holes and Hills

a Caramel Pudding
