A FIELD GUIDE TO THE IMPOSSIBLE
Fly between two skies. Follow the light around the dark.
WASD move · R / F rise / descend · Arrows turn · Q / E roll · Shift faster.
Drag on the sky to look. Scroll to zoom. T jumps to the next viewpoint. Fly through a wormhole to change galaxies.
This is a stylized visual model, not a general-relativity simulation. Desktop WebGL recommended.