On opening a door, they find themselves in a white void, where their clothes change from everyday wear to orange and black leather outfits.
Rubin had the sensation of bursting through a black curtain into a white void.
He seemed to be drifting through a translucent, white void.
It was like being suspended in a white void.
With the wind dying down, the city seemed to have slipped into a white void.
From the white void a small form grew larger and resolved itself into the image of Opaka.
In other words, imagine a black point floating in a white void and a camera.
She finds herself in a white void but is overwhelmed by the black ooze.
She finds herself once again in the white void, but this time is accompanied by the Light, who wakes her up.
That was the white void he had lived in, the whiteness in his dreams.