// The following code produces a red dot over a circular gradient background.
// The red dot (sphere) disappears if +uv and +mb0 are used
// If either of those are switched off, the scene renders correctly
// In either case +ud does not display anything
//
// Checked in official POV-Ray 3.1g for Windows and MegaPOV 0.6a
//
// February 12, 2001
// Peter Popov

sphere 
{ 0, 0.00025
	texture
	{
		pigment { red 1 } 
		finish { ambient 1 }
	}
	no_shadow
}

plane
{
	-z, -1
	pigment { rgb 1 }
}

light_source
{
	-5*z color rgb 1
	spotlight
	point_at 0
	radius 0.1
	falloff 0.5
	tightness 75
}

camera
{
	location -5*z
	look_at 0
  angle 1
	orthographic
}