spotlight
// create a point spotlight (conical directed) light source
light_source {
0*x // light's position (translated below)
color rgb <1,1,1> // light's color
spotlight // this kind of light source
translate <40, 80, -40> // <x y z> position of light
point_at <0, 0, 0> // direction of spotlight
radius 5 // hotspot (inner, in degrees)
tightness 50 // tightness of falloff (1...100) lower is softer, higher is tighter
falloff 8 // intensity falloff radius (outer, in degrees)
}