Worksheet 7 — Part 3 · Reflective Sphere
The sphere is now a mirror ball: the environment is looked up along the reflected view vector. Drag to orbit.
Reflection: the incident direction is
iw = pw − e
(world fragment position minus eye), and the reflected direction is
rw = reflect(iw, nw). A reflective uniform
selects this path for the ball while the background quad keeps sampling along its ray direction.