Radiosity with Blender By Toussaint Frédéric

Starting the calculation

To start the calculation of the radiosity solution, the only thing left to do is to press the "Go" button, and then you will see in real time how the calculation of the solution evolves. The cursor turns into something different during this operation, and the header over the  buttons indicates that Blender is calculating the solution : "Solving". Once the solution has been found, you can freely move in the display viewport to make sure the solution is good enough for your needs. The calculation time rely heavily on the power of your processor. Moreover, unfortunately, the SMP solutions are not yet taken into account by Blender.
The  buttons let you adjust the intensity and the contrast of the solution. You can set them at will, but remember that we still HAVE to add a light source in the final rendering, so this one will add itself to the radiosity solution. Because once we would have left the radiosity mode we couldn't use anymore these functions, you should better have something a little darker than needed at start..