However, interior areas with many, many lights are not always best suited for radiosity it just takes too long to calculate the solution. Users must find a working balance between their rendering requirements and computer resources, then define when and where to use radiosity. In a radiosity solution, the lighting settings differ slightly from those in a standard ray-traced image. Radiosity uses the Brightness setting in the Define Light tool. This Brightness value is only used in radiosity, and is ignored in standard ray tracing.
Standard ray tracing uses only the Intensity value.
When set properly, it is possible to use the same lighting cell for both a standard ray tracing and a radiosity solution. As an example for those more familiar with bulb wattage, the lumen value of a standard 100-watt light bulb is approximately 1500 lumens. When lighting cells are in place, move on to the surface subdivision settings. The quality of the radiosity solution is dependent on these settings, which define how finely each surface in our model is divided up into a working mesh. The finer the subdivision, the more accurate the solution, but also, a finer working mesh will require longer processing time.