Overview
hese parameters control the V-Ray messages displayed in the V-Ray Frame Buffer Log panel. During rendering, V-Ray writes various information in the file vray4blender_log.txt located in the respective temporary folder. The Output Window (and VFB) shows some of that information so that you can view it without the need to manually open that file.
The V-Ray log file can be found by default in the following places:
Windows: C:\Users\<user>\AppData\Local\Temp\vray4blender_log.txt
Logging
Log Level – Determines which messages, if any, are going to be displayed in the Output Window.
