In Program 16.12, replace the blue roombox with the lake scene skybox. Don’t forget to disable lighting on the skybox.

Program 16.12

Compute Shader struct Stack Element { int type; int depth; // type of ray ( 1 = reflected, 2 = refracted. Shadow rays are never pushed on stack) // depth of the recursive raytrace // which of the five phases of a recursive call is currently being processed // holds the computed ADS color // holds the reflected color int phase; vec3 phong_color, vec3 reflected_color;