SPACETIME_3D
3D embedding-diagram style spacetime curvature demo. Turn on launch mode, click-drag on the surface to place and aim a photon, then release to watch the path bend near the mass. This is a visually intuitive approximation, not a full numerical Einstein-equation solver.
MASS 1.00
CURVATURE 1.45
RAY BEND 1.10
ORBIT — drag when launch mode is OFF
ZOOM — mouse wheel
PLACE PHOTON — turn launch mode ON, then click-drag on the grid and release
Each photon moves at nearly constant speed while its direction bends toward the mass. Near the photon sphere, carefully aimed rays can loop before escaping or being captured. Captured photons redshift and fade instead of instantly disappearing. The surface is a 3D curvature visualization; the ray-bending dynamics are tuned for intuitive behavior.
event horizon photon trajectory trail