You shouldn't face performance issues even on really complex distributions. Is that behaviour typical for any new scene or do you facing it with some specific one? Would you mind to send us
your scene (ideally a simplified version of it) to have a look at it here?
As a first advice I would suggest you to switch from the Points-Cloud
mode to Proxy
(for example Plane
Also please try to deactivate the Use DirectX acceleration
option, to check if there is any improvement. The Use DirectX acceleration
option you can find under the Display
roll-out of the Forest object (where you can also switch between various display modes).
I should mention, even that all viewport rendering is handled by 3ds Max and Forest Pack has no influence on it, the problem eventually might be related to the graphics driver. Would you please try to change temporary the 3ds Max's display driver from "Nitrous" to "Legacy Direct3D", to check if there is some difference (Customize
-> Choose Driver
Thanks in advance for your collaboration, your feedback is very important to us.