Control is illuminated with a mixture of lighting techniques, including precomputed global illumination. To add some extra pizzazz to proceedings, players can enable Ray-Traced Indirect Diffuse Lighting, which in simpler terms means that rays are traced, and if a ray strikes a bright light or surface, surrounding game elements will be naturally illuminated.
In addition, if the ray’s point of contact happens to be colored, that color will naturally spread to surrounding detail.
For an example, check out the interactive comparison below. Without ray tracing, a bright white spotlight simply illuminates green foliage. But with ray tracing, the bright light realistically bounces from the foliage, absorbing its color, naturally bathing the floor, walls, and deeper layers of foliage with green light.