Autodesk 12812-051462-9011 User Guide 3 - Page 1046

Read Only (FG Freeze) Determines whether or not mental ray uses the final gather map file as is. When off, mental ray can add new final gather points if necessary. When on, mental ray uses only the data in the specified file, and does not generate any new final gather points during the pre-processing stage. It can still generate new final gather points while rendering when using the radius method. Available only when you've specified an FGM file. Default=off. This setting is available on the Rendered Frame Window as Reuse > Lock Final Gather on page 6083. ... [Browse] Click to display a file selector dialog, which lets you specify a name for the final gather map (FGM) file, and the folder where it is saved. [file name] After you specify a final gather map file using the browse control (see preceding), the name field displays its name and path. This field can also be filled automatically with the default path and the file name temp.fgm by turning on the Rendered Frame Window > Reuse group > Final Gather on page 6083 check box. Delete File Click to delete the current FGM file. Generate Final Gather Map Now Processes the final gather pass for all animation frames (as specified in the Common Parameters rollout > Time Output group on page 6124). Generates the maps to the specified file without rendering the scene. To reduce flicker when rendering an animation with a networked render farm, use this function first to generate the final gather solution for all frames, and then turn on Read Only (FG Freeze) before rendering. Advanced group Noise Filtering (Speckle Reduction) Applies a median filter using neighboring final gather rays that are shot from the same point. This parameter lets you choose a value from a drop-down list. The options are None, Standard, High, Very High, and Extremely High. Default=Standard. The practical effect of increasing the Noise Filtering value is to make the scene illumination smoother, at a cost of render time. However, increasing filtering can also make the illumination somewhat darker. Noise Filtering works by eliminating stray rays that are considerably brighter than most of the rest. For example, in a situation in which most of the rays mental ray Renderer | 6301