Autodesk 12812-051462-9011 User Guide 3 - Page 940

In addition, you can calculate radiosity up to an Initial Quality less than 100 percent, then later increase the value of Initial Quality, click Continue, and resume solving radiosity. In either case, Continue saves time by avoiding regenerating the radiosity solution from scratch. Once the full Initial Quality percentage has been reached, clicking Continue has no effect. Stop Stops the radiosity processing. The Start menu changes to Continue. You can later click Continue to resume radiosity processing, as described for the Start menu. Keyboard shortcut: Esc Process group The options in this group set the behavior of the first two stages of the radiosity solution, Initial Quality and Refine. Initial Quality Sets the quality percentage at which to stop the Initial Quality stage, up to 100%. For example, if you specify 80%, you will get a radiosity solution that is 80% accurate in energy distribution. A goal of 80 to 85% is usually sufficient for good results. During the Initial Quality stage, the radiosity engine bounces rays around the scene and distributes energy on surfaces. Between each iteration, the engine measures the amount of variance (noise between surfaces) that was computed. Most of the brightness of the scene is distributed in the early iterations. The contribution to the scene's average brightness decreases logarithmically between iterations. After the first few iterations, the brightness of the scene does not increase much, but subsequent iterations reduce the variance in the scene. Default Scanline Renderer Controls | 6195