/*(x^2 + b*y^2 + z^2)^2 - a*(x^2 + z^2)*y = x^4+2*x^2*b*y^2+2*x^2*z^2+b^2*y^4+2*b*y^2*z^2+z^4-a*y*x^2-a*y*z^2 */ #include "colors.inc" #include "stones.inc" #include "metals.inc" camera {orthographic location <0,10,-10>*2 look_at<0,8,0> angle 115} light_source { <-10,18,-20> color White } light_source { <10, -1,-10> color rgb <1,0.6,0>*0.7 } light_source { <0,18,-2> color Yellow } background{White} //SkyBlue*1.2} #declare a=-4.; #declare b=0.02; poly {4, <1,0,0,0,2*b,0,-a,2,0,0,0,0,0,0,0,0,0,0,0,0,b*b,0,0,2*b,0,0,0,-a,0,0,1,0,0,0,0.> texture{ T_Gold_5A normal { granite 1 turbulence 0.5 scale 0.4 accuracy 0.5 } } finish {ambient 0.4 diffuse 0.6 reflection 0.1 roughness 0.001 specular 0.8} scale 1 rotate<180,0,0> translate <0,-20,0> }