|parallel shadows crossing the sky|
| The shadows and rays plunge down toward the ant-solar point, the anti-sun. They are called 'anti-crepuscular' as though opposing the 'crepusculum' - twilight. 'Anti-solar' is perhaps more accurate.
The long shadows are parallel and only appear by perspective to converge towards the point directly opposite the sun. Roads and railway tracks similarly appear to converge in the distance.
The shadows darken as they near the antisolar point because the eye looks increasingly along the long corridors of shadowed air rather than across them.