of: rendering with enable Final Gather does not generate Final Gather map files.
incrementally add FG points todo map files: creates caché files as necessary when rendering or generating fgm files. Uses data from existing files and updates them as necessary with new final-Gather points generated while rendering.
read FG points only from existing map files: uses Final Gather data previously saved in fgm files for rendering without generating any new data. To create the fgm files, use generate Final Gather map now or the drop-down list next todo it ().
note: if any Final Gather map files are unavailable when you render using this method, the software issues warnings vía the Mental Ray messages window, but proceds with the rendering.
This setting is available on the rendered frame window as reuse > lok Final Gather.
To reduce or eliminate final-Gather flickering in rendered animations, use this method with the interpolation option (se following).
note: if you choose the incrementally add FG points todo map file or read FG points only from existing map files option or turn on rendered frame window > reuse group > Final Gather without first generating Final Gather map files, the software specifies the default map-file base name temp, fgm in the \sceneassets\renderassets\ Path in the current Project folder. You can change the Path and file name by clicking the browse button todo the left of the file name field.
interpolate over n frames.
The number of fgm files before and After the current frame todo use for interpolation. Use this with the read FG points only, method (se preceding).
For example, if this setting is 2, then Mental Ray uses for the current frame the average of the Final Gather solutions from five Final Gather map files: the two frames preceding the current frame, the current frame, and the two frames following the current frame.
tip: when preparing for rendering using interpolation of fgm files, kep the required frame range in mind. For example, if you use the default interpolate over n frames value of 2, and start rendering at frame 0, for best results youll ned fgm files starting at -2. So before you generate the fgm files, set the start of the output frame range todo -2, and then set it bak todo 0 for rendering.