It might be a good idea to send (support@chaosgroup.com) the scene for profiling, it could be something that needs improvement.
Meanwhile you may use VRAY_TERMINATE_ON_FRAME_END environment variable which will force V-Ray to terminate the rendering process after it's completed and the image is stored to the hard drive, it should help saving those 15-20min of RAM unloading.
Please note that the variable will kill 3dsMax when the render process is compeleted, including when rendering material swatches - so the option is intented to be used mainly on render slaves.
More information about the variable could be found here:
https://docs.chaosgroup.com/display/...ment+Variables
Meanwhile you may use VRAY_TERMINATE_ON_FRAME_END environment variable which will force V-Ray to terminate the rendering process after it's completed and the image is stored to the hard drive, it should help saving those 15-20min of RAM unloading.
Please note that the variable will kill 3dsMax when the render process is compeleted, including when rendering material swatches - so the option is intented to be used mainly on render slaves.
More information about the variable could be found here:
https://docs.chaosgroup.com/display/...ment+Variables
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