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>
> I slightly revised my file, then post here. In fact I'm not sure its scale is
> right or not. I haven't seen snow in real life. It's a box with 3.2 meter side
> lengths.
>
>
> #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 10, 10
> 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 {
> <-4, -2.5, 4>*100
> color rgb <1.0, 0.88, 0.76>*0.80
> parallel
> point_at <0.0, 0.0, 0.0>
> rotate <0,0,-56>
> }
>
>
>
>
>
> sky_sphere{
> pigment {rgb <0.35,0.55,1>*0.36}
> }
>
>
> //------------------------------------------
>
>
>
>
>
>
>
>
>
>
>
>
> //My render is z toward sky, xy horizon
>
>
> camera{
> location <8,4,4>
> look_at <0, 0, 0>
> right <-4/3,0,0>
> sky <0,0,1>
> angle 24
> }
> //----------------------------------------
>
>
> #declare material_snow =
> material{
> texture{
> pigment{
> rgb<0.93,0.93,0.93>
> }
> finish{
> diffuse 1.0
> subsurface{translucency rgb<1,1,1>*6}
> }
> }
> }
>
>
> //----------------ground------------------------
>
>
>
>
>
>
>
> #declare t_soil1=
> texture{
> pigment{rgb<0.2,0.164,0.1>*0.9}
> finish{ambient 0 diffuse 1}
> }
>
>
>
>
> plane{
> <0,0,1>,0
> texture{t_soil1}
> }
>
>
>
>
>
>
>
> //--------------------cloud----------------------
>
> #include "functions.inc"
>
>
> #declare f_test =
> function(x,y,z) {
> +0.20*sum(i, 0, 3, pow(abs(f_noise3d(x*pow(2, i)/0.3, y*pow(2, i)/0.3,
> z*pow(2, i)/0.3)), 2.5)/pow(2.0, i) )
>
>
> }
>
> isosurface {
> function {0.5 - f_test(x,y,z)*3.5*3.5*z*exp(-3.5*z) -
> 0.32*3.5*3.5*z*exp(-3.5*z)}
> contained_by { box { <-1.0, -1.0, 0.0>, <1.0, 1.0, 1.0> } }
> threshold 0.0
> accuracy 0.001
> max_gradient 2
> //all_intersections
> //open
>
> material{
> material_snow
> }
>
>
> scale <1.6, 1.6, 0.8>
> translate<0,0,0>
>
> }
>
>
>
>
>
>
> #declare t_soil2=
> texture{
> pigment{
> function{0.5 + 0.2* (0.5 - f_test(x,y,z)*3.5*3.5*z*exp(-3.5*z) -
> 0.32*3.5*3.5*z*exp(-3.5*z))}
> color_map{
> [0.0 rgb<0.2,0.164,0.1>*0.03]
> [0.504 rgb<0.2,0.164,0.1>*0.03]
> [0.533 rgb<0.2,0.164,0.1>*0.9]
> [1.0 rgb<0.2,0.164,0.1>*0.9]
>
>
> }
> scale <1.6, 1.6, 0.8>
> }
> finish{ambient 0 diffuse 1}
> }
>
> box{
> <-1.601, -1.601, 0.0>, <1.601, 1.601, 0.20>
> texture{t_soil2}
>
>
> }
>
Not bad. Some packed, partly melted snow.
I've seen some snow those last days :)
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com> wrote: