March 02, 2012, 11:51:39 pm
Strange, after I installed the public version of 2.1 Build 4 (instead of using the pre-release version) the small plants were not swaying too fast anymore.
Could you try to restart Lumion, place a few small flower objects in the scene and check if the plants are still swaying too fast?
If so, the only option is indeed to copy the SpeedTree.dll file from 2.1 Build 3 and overwrite this file in 2.1 Build 4.
It is located in:
Lumion Installation Folder/Channels/