This page provides information on V-Ray IPR within 3ds Max.

 

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Overview


V-Ray Interactive Production Rendering (IPR) provides interactive rendering using the V-Ray and V-Ray GPU renderers.

Settings for the behavior of the VFB when using IPR rendering can be found in the IPR options rollout under the V-Ray tab in the Render Setup window for the V-Ray renderer and in the Render Settings rollout under the V-Ray tab for the V-Ray GPU renderer.

 

Using V-Ray IPR


The IPR option is accessible from the V-Ray Frame Buffer (VFB).

To use V-Ray IPR:

In the Render Setup window, make sure the Production render engine is set to V-Ray. To open the VFB, click the Last VFB button on the V-Ray Toolbar, or go to the respective Render Setup rollout for V-Ray or V-Ray GPU engine.


 


When the Renderer is V-Ray, the IPR options rollout appears under the V-Ray tab.


When the Renderer is V-Ray GPU, the IPR options appear under the Render settings rollout of the V-Ray tab.

 

 

 



 

When the renderer is V-Ray, Viewport IPR is accessible through the Shading menu of the Viewport

 



  1. To start IPR, click the Start interactive rendering button on the VFB toolbar. You can now make changes to the scene while the rendering continues, and the changes will be rendered automatically. 





  2. When the scene is rendering, the Start interactive rendering button changes to the Refresh interactive rendering button. Click this button to restart the rendering at any time. The progress bar at the bottom of V-Ray Frame Buffer tracks the rendering progress of the current scene.





  3. Use the Stop rendering button to stop V-Ray IPR. After stopping, you can click Start interactive rendering again to restart IPR.




Additional Features


While IPR is running, if the Fit resolution to VFB option is enabled in the IPR options rollout, the render will refresh to fill the VFB if the VFB window is resized. The render output size will also change accordingly. The same setting for V-Ray GPU can be found in the V-Ray tab > Frame buffer rollout > Fit IPR resolution to VFB.


 

Rendering at Original Size (800 x 600)

Rendering with VFB Resized (588 x 441)

 



In addition, the IPR rendering will refresh whenever the Region Render area is redrawn.


 

 

Original Region Render

 IPR refreshes as the Region Render area is altered.

 

 The Test Resolution button is inactive in IPR when Fit resolution to VFB is enabled.


Viewport IPR


 

Viewport IPR rendering offers a number of benefits to the production process.

It is accessible from the ||Viewport menu|| > Shading > V-Ray IPR.

Viewport IPR uses the currently set render engine (V-Ray Next or V-Ray GPU Next).

You can stop the interactive rendering from the same menu. It also gives access to the Debug Shading options.

 The Viewport IPR works only in versions of 3ds Max 2017/2018/2019/2020.

 

 

Viewport Parameters


These settings control the way IPR works in the Max viewport.

 

 

Stop V-Ray IPR – Stops rendering.

Isolate Selected – Renders only the selected object(s), while the rest of the scene is rendered black. You can also select materials/textures nodes and all of the objects with the shader are isolated.

Isolate Locked Selection – Renders only the locked object for shading.

Lighting – Renders only the light contribution in the scene.

Ambient Occlusion – Shows only the ambient occlusion in the scene.

Wireframe – Shows the rendered objects in wireframe.

Normals – Shows the normals of the rendered objects.

UVs – Displays the UV coordinates of the rendered objects in color grade.

Barycentric coordinates – Displays the Barycentric coordinates of the rendered objects.

 

Notes


  • V-Ray IPR will render V-Ray Render Elements, although it will not track changes to the render elements and the render will need to be refreshed.
  • V-Ray IPR doesn't support 3ds max default lights.
  • In the occasion V-Ray Viewport IPR option is not showing in the Shading menu, see the Registering the V-Ray Menus section or the Viewport information on the Menu Integration page.
  • VFB Color Corrections are now applied to the Viewport IPR. Note that the control panel resides in the VFB.