// Evening beach: glass sphere on marble box in sand
#version 3.7;

global_settings {
    assumed_gamma 1.8 max_trace_level 16
    radiosity {
        pretrace_start 0.08
        pretrace_end   0.01
        count 200
        nearest_count 10
        error_bound 0.5
        recursion_limit 2
        low_error_factor 0.5
        gray_threshold 0.0
    }
}

#default { finish { ambient 0 diffuse 1 } }

// ---------- Background / Sky (evening gradient) ----------
sky_sphere {
  pigment {
    gradient y
    color_map {
      [0.00 color rgb <0.98, 0.60, 0.34>] // warm horizon
      [0.20 color rgb <0.92, 0.70, 0.55>]
      [0.55 color rgb <0.55, 0.70, 0.90>]
      [1.00 color rgb <0.18, 0.24, 0.45>] // deep upper sky
    }
    scale 2
    translate -1
  }
}

background { color rgb <0.02, 0.03, 0.05> } // fallback

// ---------- Camera ----------
camera {
  location <0.0, 1.65, -8.4>
  look_at  <0.0, 0.75,  0.0>
  angle 35
  up <0,9,0>
  right <16,0,0>  // right,up -> 16:9
}

// ---------- Lights (warm + soft shadows) ----------
light_source {
  <35, 8, -45>                         // low-ish sun direction
  color rgb <1.00, 0.78, 0.52>*1.25
  area_light <3.5,0,0>, <0,0,3.5>, 7, 7
  adaptive 1
  jitter
}

light_source {
  <-10, 10, -8>                        // soft sky fill
  color rgb <0.90, 0.92, 1.00>*0.30
  area_light <2.2,0,0>, <0,0,2.2>, 6, 6
  adaptive 1
  jitter
}

// ---------- Materials (simple, fast) ----------
#declare Mat_Sand = texture {
  pigment {
    // subtle grain + color variation
    bozo
    color_map {
      [0.00 color rgb <0.86, 0.78, 0.62>]
      [0.55 color rgb <0.82, 0.74, 0.58>]
      [1.00 color rgb <0.76, 0.68, 0.52>]
    }
    scale 0.25
  }
  finish { diffuse 0.95 specular 0.06 roughness 0.10 }
}

#declare Mat_Water = texture {
  pigment { color rgb <0.08, 0.20, 0.30> }
  finish  { diffuse 0.25 specular 0.35 roughness 0.02 reflection 0.12 }
}

#declare Mat_Marble = texture {
  pigment {
    marble
    color_map {
      [0.00 color rgb <0.92, 0.92, 0.94>]
      [0.35 color rgb <0.82, 0.83, 0.86>]
      [0.65 color rgb <0.95, 0.95, 0.97>]
      [1.00 color rgb <0.78, 0.80, 0.84>]
    }
    scale 0.75
    turbulence 0.25
  }
  finish { diffuse 0.80 specular 0.25 roughness 0.02 reflection 0.05 }
}

#declare Mat_Glass = texture {
  pigment { color rgbt <1,1,1,0.92> } // mostly transparent
  finish  { diffuse 0.05 specular 0.65 roughness 0.004 reflection 0.10 }
}

#declare Int_Glass = interior {
  ior 1.52
}

// ---------- Geometry: beach ground (sand) ----------
plane {
  y, 0
  texture { Mat_Sand }
  // light dunes (kept subtle for speed)
  normal { bumps 0.35 scale 0.45 }
}

// Ocean plane slightly lower, starting far away (simple intersection)
intersection {
  plane { y, -0.03 }
  box { <-200, -10, 20>, <200, 10, 400> }
  texture { Mat_Water }
  normal { ripples 0.20 scale 1.6 }
}

// ---------- Central object: marble box partially in sand ----------
#declare Box_Min = <-1.05, 0.00, -1.05>;
#declare Box_Max = < 1.05, 0.62,  1.05>;

// Sink the box a bit into sand by lowering it
#declare Box_Drop = -0.06;

box {
  Box_Min + <0,Box_Drop,0>, Box_Max + <0,Box_Drop,0>
  texture { Mat_Marble }
}

// ---------- Glass sphere sitting precisely on box top ----------
#declare Sphere_R = 0.80;
#declare Box_TopY = (Box_Max.y + Box_Drop);         // top after drop
#declare Sphere_CenterY = Box_TopY + Sphere_R;       // exact contact

sphere {
  <0, Sphere_CenterY, 0>, Sphere_R
  texture  { Mat_Glass }
  interior { Int_Glass }
}

// ---------- Slight darkening near horizon (atmosphere hint) ----------
fog {
  distance 45
  color rgb <0.95, 0.72, 0.55>
  fog_type 2
  fog_offset 0.2
  fog_alt 1.2
}