Point Light
The point light is an omnidirectional light source that emits the same amount of light in all directions, producing hard shadows. The point light represents an infinitely small point in space and can be used as the simplest light model, for example, to simulate a light bulb or a star that illuminates the scene uniformly. In Blender, the point light is visualized as a tiny sphere or a dot.
The intensity of point light can be measured in Watts or Lumens. For details on the group, color and intensity controls for point light, see the Common Light Properties section.
The point light as such is not physically correct due to its infinitesimally small size.
However, RPR 2.0, being a physically based renderer, creates a very small sphere light with the center at the respective point light location. Many applications add a ‘Softness’ parameter to their point lights. In cases where softness is desired on point lights, use a point light with a non-zero Shadow Soft Size parameter.
Light Texture
Instead of emitting flat and uniform color, point lights can be configured to use textures. Assigned to point lights, textures affect the color and intensity of the emitted light and can help you create various lighting effects.
Note that since this type of light sources emits light in all directions, you might want to use spherical (360 degrees) images as textures, such as in the EXR or HDR maps.
