Autodesk 12812-051462-9011 User Guide 3 - Page 943

of processing time. Typically, this option is useful for objects that have a lot of small surfaces and show a lot of variance, such as railings or chairs or highly subdivided walls. NOTE After 3ds Max processes Refine Iterations, Initial Quality is disabled and you can't change it until you click Reset or Reset All. Process Refine Iterations Stored in Objects Each object has a radiosity property called Refine Iterations. Each time you refine an object selection, the number of steps stored with these objects is incremented. When you reset the radiosity solution and then start it again, the steps for each objects are refined automatically, provided this toggle is turned on. This is useful when you are creating animations, when the radiosity needs to be processed at every frame, and the same level of quality between frames has to be maintained. Update Data When Required on Start When on, the radiosity engine must be reset and then recalculated if the solution is invalidated. In this case, the Start menu changes to read Update & Start. When this is pressed, the radiosity solution is reset and the calculation starts over again. When this toggle is off, the radiosity solution does not need to be reset if it is invalidated. You can continue processing your scene with the invalid solution. NOTE The radiosity solution is invalidated any time an object or light is added, removed, moved, or altered in any way. Interactive Tools group The options in this group help you adjust the display of the radiosity solution in the viewport and in the rendered output. These controls take effect immediately on an existing radiosity solution and do not require any additional processing for you to see their effects. Indirect Light Filtering Reduces the amount of noise between surface elements by averaging the indirect lighting levels with the surrounding elements. A value of 3 or 4 is usually sufficient. If you use too high a value, you risk losing detail in the scene. Because Indirect Light Filtering is interactive, you can readily evaluate the result and adjust it as you need. Direct Light Filtering Reduces the amount of noise between surface elements by averaging the direct lighting levels with the surrounding elements. A value of 3 or 4 is usually sufficient. If you use too high a value, you risk losing detail in the scene. Direct Light Filtering is interactive, so you can readily evaluate the result and adjust it as you need. 6198 | Chapter 20 Rendering