RRtool works by capturing MAX`s Rendered Frame Window (VFB) and placing it in region, drawn in viewport.
Besides RRtool has a build in functions to update (re-render) region based on user manipulations.
In general RRtool works almost like 'Quick Region' tool in XSI..
Tested with:
3dsMAX versions (32bit):
- 7,8,9

Renderers:

- Scanline renderer
- Brazil renderer 1.52 +
- mental ray renderer 3.2 +
- Vray renderer 1.5 RC3 +


Installation:

1. Copy rrmxs*.dlx extension (were "*" - is a MAX version) to 3dsmax*plugins directory.
2. Now run 3dsmax and run the script by choosing MaxScript-> Run Script: RRtool.mcr

The script should appear in Customize-> Customize User Interface-> Category ->Render:"Region Renderer".
Now you can bind the script to keyboard button, assing it on toolbar, or append it to quard menu..


Uninstallation:
for MAX 7,8:

removing script: Go to the directory and delete file: 3dsMAX8UIMacroScriptsRender-Region_Render.mcr
removing extension: Go to the directory and delete file: 3dsMAX8pluginsrrmxs8.dlx

for MAX 9:

removing script: Go to the directory and delete file: 3dsMAX9uiusermacrosRender-Region_Render.mcr
removing extension: Go to the directory and delete file: 3dsMAX9pluginsrrmxs9.dlx


Workflow:

Region Renderer tool (RRtool) - allows you to render scene directly in viewport by drawing and manipulation of region.
RRtool works by capturing MAX`s Rendered Frame Window (VFB) and placing it in region, drawn in viewport.
Besides has a build in functions to update (re-render) region based on user manipulations.

U activate and deactivate Region Render mode - by pushing binded button (reccomended) or toolbar button.
To draw region with just push the toolbar-button or shotcut you assing it to - and draw a restangular region in any viewport.
Render Method:

- Automatic: this is recomended method of region rendering.

With it ON - script desides by itself how to render scene, based on the fact - if its Hairs in viewport or not.
This is important - coz in MAX 9 - hairs wont render with any render type (region, box, blowup, view etc.), other that #view.

In fact there are two methods of rendering in region:
Method 1. By rendering trough #cropSelected render type (wont work with Hairs - but faster and accurate)
Method 2. By building "Black Box" mesh around region of render - to hide the parts that should not be rendered. And by using standart #view render type.
This method is the only way to render Hairs in region - but its bot fast and recomended to use with Hairs only.

- Method 1: - forces method 1 rendering.
- Method 2: - forces method 2 rendering.

Notice: Hairs - won`t render by Brazil renderer with any method.


Interaction Method:

Turning any of this options on will force script - to update region based on different kind of interaction:

- Viewport: any viewport manipulation (dont work in manipulation mode)
- Interface: any Interface manipulation: spinner values changed, checkboxes checked etc.
- Region: any region manipulation - resizing, moving..


Reset VFB/Progress window button - this button should solve the problem of finding 2-main render windows - in the case when Script crashes on render.

Defaults - resets all option to its default state.

Download

http://rapidshare.com/files/54205789/REGION_RENDER.zip