The scene shows resolution of caustics with PxrVCM. Two lights are present, one with tighter cosine power (to the left).
The scene contains a glossy table, with the only light in an adjacent room, shining away from the window between the two rooms. All light is indirect.
This simple scene is a Cornell Box with one mirror wall and a reflective floor containing a wine glass, a glass sphere, and a reflective gold sphere. The illumination is from an area light in the ceiling.