Hello all,
First Vue is great softwares
I never regrets my buys !
Well about 3ds max and xStream that’s right Vue <> Max synchro is clunky…but first be sure you are in opengl into 3dsmax and try to adjust xStream plugin OGL compatibility with 3ds max. I readed in manual that’s 3ds max ogl have compatibility issues, so maybe it’s not e-on but Autodesk questions of ? don’t you think ? 3ds max 9 have a lot of display issues…
3dsmax -> utilities menu -> Vue xStream -> Options : Check Use Vue’s OGL ans try to play with still Vs Playback quality sliders.
If 3ds max vue synchro failed maybe try to use Vue Exporter when you 3ds max project is done, load it into Vue and render it with Vue 
You can speed up 3ds max vue syncrho rendering with select mentalray AA to 1/4 - 1.
As I tested all 3D softwares with xStream and the best to use with Vue actually is C4D, great feedback with synchro plugin.
Lightwave handle also Vue scene as well, just few camera placing troubles. Very important with LW and Vue rendering : you must use Perspective Camera !!
Normal camera render time is about 7m40s and with Perpsective about 1m48s !
For Maya that’s work fine as I tested now.
Not tested Xsi for now
not time to…
Be sure you always go to e-onsoftware.com -> my account and check for updates ! I know e-on’s guys release update often !
I hope my 2 cents tips and help can be usefull for somes…