#version 3.7;



global_settings{
max_trace_level 3
assumed_gamma 1.0
adc_bailout 0.007
mm_per_unit 1000 //important for subsurface

radiosity{
 pretrace_start 64/image_width
 pretrace_end   4/image_width
 count 60
 nearest_count 6
 error_bound 0.64
 recursion_limit 8
 low_error_factor 0.5
 gray_threshold 0.0
 brightness 1
}
    subsurface{
        samples 8, 8
        radiosity off
    }
}

default{
texture{
    pigment {rgb<0.2,0.2,0.2>}
    finish{ambient 0 diffuse 0}
}
}
//---------------------background------------------------
background{rgb <0,0,0>}

//-------------------settings--------------------------------
//--------------------light source-----------------------------




light_source {
<-1, -2.5, 4>*100
color rgb <1.0, 0.86, 0.66>*0.85
parallel
point_at <0.0, 0.0, 0.0>
rotate <0,0,16>
}





sky_sphere{
    pigment {rgb <0.35,0.55,1>*0.6}
}


//------------------------------------------












//My render is z toward sky, xy horizon


camera{
location <10, -5, 16>
look_at <0, 0, 10>
right <-4/3,0,0>
sky <0,0,1>
angle 24
}
//----------------------------------------


//----------------ground------------------------
#declare t_soil1=
texture{
    pigment{rgb<0.2,0.164,0.1>*0.8}
    finish{ambient 0 diffuse 1}
}


plane{
<0,0,1>,0
texture{t_soil1}
}









//--------------------cloud----------------------

#include "functions.inc"

#declare f_test =
function(x,y,z) {
    //sqrt(x*x + y*y) - 0.4
   +0.36*sum(i, 0, 4, pow(abs(f_noise3d(x*pow(2, i)/0.2, y*pow(2, i)/0.2, z*pow(2, i)/0.2)), 2.5)/pow(2.0, i) )


}

isosurface {
    function {0.5 - f_test(x,y,z)*3*3*z*exp(-3*z) - 0.36*3*3*z*exp(-3*z)}
    contained_by { box { <-0.5, -0.5, 0.0>, <0.5, 0.5, 1.0> } }
threshold 0.0
accuracy 0.001
max_gradient 2
//all_intersections
//open

    material{
        texture{
            pigment{
            rgb<1,1,1>
            }
            finish{
                diffuse 1.0
                subsurface{translucency rgb<1,1,1>*6}
            }
        }
    }
    
    
    scale <1.6, 1.6, 1.0>
    translate<0,0,10>

}