Radiosity is different than most rendering solutions is that radiosity requires additional an additional processing step in addition to the normal render. This process creates a hidden meshing solution on all geometry in the scene to store what is known as a radiosity solution. Once your scene is processed, following frames during render time do not require the solution to be reprocessed. Any time a change is made however, the solution must be redone. To use radiosity in your scene, you first need to add a photometric light. It is important to know the size of your scene and also relative brightness of the light you choose. I chose a free area light for this particular scene and placed near the top of the ceiling. Radiosity works well for indoor scenes, light tracer, a different rendering solution, tends to work better for outdoor environments. Once you have set up your lighting, its time to set up your solution. Under Rendering > Advanced Lighting > Radiosity is where you set up the radiosity render settings. There are many options to tweak under these settings. Let’s go through them all to help better explain how to use them to better. Initial Quality defaults to 85%, ...