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Here is an example of isosurfaces. The POV code is below.
The rendering time is about 6 min for [640x480 No AA] on my PC (Celeron
600MHz).
R. Suzuki
#version 3.5;
#include "colors.inc"
#include "functions.inc"
#include "metals.inc"
#include "stones.inc"
camera {location <0.0, 2.8, -4.0> direction 1.8*z
right x*image_width/image_height
look_at <0.0, 0.2, 0.0>}
sky_sphere { pigment { gradient y
color_map { [0.0 rgb <0.6,0.7,1.0>] [0.7 rgb <0.0,0.1,0.8>]}
}}
light_source { <0, 0, 0> color rgb 1.8 translate <-30, 30, -30>}
object{isosurface {
function {
f_r((mod(x*80+160+sin(y*pi*3+f_noise3d(x*10,y*2,z*10)*pi*0.5
+f_noise3d(x*39,y*3,z*41)*pi*y*0.3)*3,1)-0.5)*0.0125,0,
(mod(z*80+160+sin(y*pi*3+f_noise3d(x*7.3,y*3,z*8.65)*pi)*3,1)
-0.5)*0.0125)+y*y*0.04 | y-0.02 }
contained_by { box { <-2,0.0,-2> <2,0.34,2> } }
threshold 0.005
accuracy 0.0005
max_gradient 2
rotate y*-2
scale 2
texture { pigment{gradient y
color_map { [0.0 rgb 0] [0.80 rgb 0.7] }
}
finish{ambient 0.25 diffuse 0.5 specular 0.4}
}
}}
sphere{<0,0.55,-0.5>,0.4 texture {T_Stone19 scale 0.4} }
#declare pi_half=pi/2;
#declare pi_2=pi*2;
isosurface {
function { f_mesh1(atan2(x,z)/pi_half,f_torus(x,y,z,0.75,0.15),
atan2(y, f_r(x,0,z)-0.75)/pi_2,1/70,1/70, 1, 0.0025, 1) }
contained_by { box { <-1,-0.4,-1>, <1,0.6,1> } }
threshold 0.002
accuracy 0.0002
max_gradient 1.2
texture {T_Copper_3A}
scale 1.4 translate <0,0.7,-0.5>
}
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