Six vertical monoliths stand in a world. Touching a monolith starts it glowing in a pulsing fashion.
TouchSensors on the monoliths route to TimeSensors, one per monolith. Each TimeSensor routes to the intensity field of a PointLight placed just in front of the monolith. Simultaneously, a monolith's TimeSensor routes to the transparency field on a Material for a Box surrounding the monolith.
As a monolith's TimeSensor fraction ramps up from 0.0 to 1.0, the PointLight intensity ramps up from 0.0 (off) to 1.0 (full on). At the same time, the monolith's outer box transparency ramps from 0.0 (opaque) to 1.0 (transparent). As the transparency increases, an emissive textured inner box for the monolith becomes visible. The inner box's emissive shading makes it appear to be a light source, and the plausible source of the PointLight source's illumination. The overall effect is one of pulsing glowing monoliths.
A grid mesh floor is used so that localized lighting effects will be obvious.