Save High Resolution Viewport Captures
Passes:
Alpha: Saves alphas from the viewport to the alpha channel of the baseimage
Color: Assigns random colors to all objects and saves the separate pass
SSAO: Saves a separate Screen Space Ambient Occlusion Pass
Wire : Saves a separate Wire Pass
Z-Depth: Control the Zdepth range and save it as a separate pass (first increase the end untill all is visible and then tweak the begin parameter)
Color, SSAO, Wire, z-depth: save a separate image or avi file to the same directory as the basefile (filename_passname.ext)
Alpha : includes an alphamask in the viewportcapture alpha channel or saves out a separate avi file for the animation.
Tested in 3ds max 9, 2010 , 2011, 2012 (DIRECT3D)
Install:
Drag Grabviewport2.mcr into your viewport or go to maxscript ->Run Script.
Now go to Customize->Customize User Interface.
Toolbars->Category->Grabviewport2 and drag the Grabviewport button into your UI or bind a key to it.
Special thanks to : Borislav Petrov (MaxScript reference), Kostadin Kotev (miauu )
for the Alpha Masking technique 