#radiosityPluginChanged: undefinedSent when the Radiosity plugin has changed.
#radiosityProcessDone: undefinedSent when the Radiosity process has finished.
#radiosityProcessReset: undefinedSent when the Radiosity process has been reset.
#radiosityProcessStart: undefinedSent when the Radiosity process has started.
#radiosityProcessStopped: undefinedSent when the Radiosity process has been stopped.