Thanks for provided screenshots. Unfortunately, in that case just from provided screenshots, is very hard to say what's causing this problem. Might be, that's this edge mode with translation
post related issue. In some cases high values used for Transform
can produce that kind of troubles.
Anyway, would you please send us your scene through WeTransfer
to email@example.com to analyse it here? Also please specify used 3ds Max / Forest Pack / V-Ray versions. Thanks in advance.