Hi(gh)!

For quite a long time I did hardly anything POV-Ray-related than just 
manually editing the Kabul 1:100,000 heightfield or, more recently, 
collecting high-resolution OpenTopMap tiles for a more advanced version 
of that heightfield...

...and now, I want to re-create a level from the Amiga game 
"Rock'n'Roll" in POV-Ray (of course for animating it from the ball's 
perspective later on...) - and fail already at the very first step, 
which is creating a layered texture for a sky_sphere (or, simpler as not 
involving UV_mapping, for six planes forming a cubic space).

The lowermost layer consist of equally spaced squares - so I thought 
using the boxed pigment would be appropriate. But... whatever I try, I 
always only get uniform black!

Is it an idiosyncrasy of 3.7? Or do I simple lose the general ability to 
do anything sensible with POV-Ray?

Here is the code:

#declare P_Cubic_Division_Blue_Layer_1=
pigment
{
   boxed
   color_map
   {
     [0    rgb 0]
     [1    rgb 1]
   }
   translate <0, -1, 0>
}

// ACTUAL SCENE

plane
{
   y, -1
   texture
   {
     pigment
     {
       P_Cubic_Division_Blue_Layer_1
       scale 0.1
     }
     finish
     {
       ambient 1
       diffuse 0
     }
   }
}

camera
{
   location 0
   look_at <0, -1, 0>
   angle 40
}

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