One responds to the way most paper surfaces are made to seem like luminous skies.

Something was over me, outlined against the luminous sky.

When I looked back, a blue haze floated over the city on the pale grey luminous sky, from all the smoke.

In the luminous sky, one early, eager star shone out.

Not a wisp of cloud marred the luminous blue sky.

Among the highlights are several paintings that capture the Island's luminous, resonant skies.

The night is warm in the streets under a luminous grey sky.

A strip of luminous sky showed between the third level and the facade of the building.

The luminous sky had likewise vanished, and I stood at a ship's solid prow once more.

The only way to follow the road was to follow the ribbon of slightly luminous sky between the trees.