Faster viewport playback speeds (up to 20% increase) through validity intervals and an optimized SetNormals MAXScript function.
Updated support for Arnold 5.4, including Arnold lights in the viewport and the ability to change render settings during ActiveShade. Autodesk 3DS MAX 2020 2020.3.2
Some users reported that the 2020.3.2 security fix could take an unusually long time to install, sometimes appearing to stall. Autodesk recommends disabling antivirus/firewalls and cleaning the %TEMP% folder before attempting the update to avoid these issues. 3ds Max 2020.3.2 Update Stalls - Forums, Autodesk Faster viewport playback speeds (up to 20% increase)