Viewport and Render Preview
From this guide you can learn how to configure 3ds Max viewport to match Verge3D look and feel, and how to use Scanline/ART rendering and the ActiveShade feature to obtain a reference image.
Viewport Settings
To enable better viewport preview in 3ds Max, switch from *Standard* to *High Quality* in the viewport settings:

Click *Realistic Materials with Maps* in the *Materials* submenu (this operation is required every time you add a new material):

Enable *Environment Background* in the *Viewport Background* submenu under *Default Shading*:

The above-mentioned settings are pre-enabled for the default cube project.
Viewport shading, however, does not always appear to provide an accurate approximation of the in-browser rendering - for instance, environment reflections ignore normal maps in the viewport, etc.
Scanline/ART Rendering
Verge3D rendering strives to be as close as possible to Scanline render if standard materials are used, and to ART render if physical materials are used. So you can preview your scenes in 3ds Max without exporting for quicker tweaking.
To select the renderer, click Render Setup... in the *Rendering* menu (F10):

In the window use the *Renderer* dropdown to switch between Scanline and ART:

To render a scene, click *Render* (Shift+Q):

Subsequently you can use the *Render* button to repeat your render:

ActiveShade Mode
For faster iterations, you can use the *ActiveShade* mode which automatically updates the render every time you modify a scene (works best with ART render).
You can enable ActiveShade in the Render Setup... window:

After that you'll be able to switch a viewport to ActiveShade mode:

This way you can achieve a better approximation of what you get in the browser, at a near real-time speed.
Got Questions?
Feel free to ask on the forums!