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The V-Ray Frame Buffer (VFB) is a second generation V-Ray virtual frame buffer.

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VFB Cloud Collaboration is a new feature available only in V-Ray 6, for 3ds Max.

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VFB Cloud Collaboration is not supported in 3ds Max 2018 and 2019.

VFB is much more than a render image holder window. The new enhanced version provides a higher level of post processing adjustments and ability to modify your scene from inside the VFB. Here is a list of old and new benefits you should know:

  • Image preview:
    Loads render elements channels via a dropdown list;
    Works with display corrections;
    Loads various 8bit and 32bit file formats, including V-Ray resumable files;
    Image comparison between 2 or 4 renders;
  • Image management:
    Keeps the rendered image in full 32-bit floating point format;
    Can store history of rendered images with their post rendering corrections;
    Can save corrected output to various image formats;
  • Image editing and post processing:
    Set Color Corrections to rendered image and its elements;
    Composite mode for Back to Beauty workflow including layers corrections;
    LightMix control on lights contribution in the rendered image;
    Applying Proportion Guides on the rendered image;
  • Scene editing:
    Can modify actual lights values by transferring updated intensity and color from LightMix mode;
    IPR camera navigation and focus control from inside VFB;
  • Render management:
    Denoiser control;
    Region rendering control and test resolution;
    Option to choose the order in which the buckets are rendered;
    Automatic render resolution adjustment in IPR when the VFB window is resized;
  • Collaboration:
    Shares images with other Chaos users in Chaos Cloud Rendering.

To use the VFB for rendering, turn on the Enable built-in frame buffer option in the Frame buffer rollout under the V-Ray tab in the Render Setup window.

VFB also has some limitations which are listed in the Notes section below.

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||V-Ray Toolbar|| > Last VFB button

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||Render Setup window|| > V-Ray tab > Frame buffer rollout > Show last VFB button

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||V-Ray menu|| > V-Ray VFB

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VFB Menu

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The V-Ray Frame Buffer menu holds the main frame buffer commands. Some of the options are also available in the VFB toolbar for a quick access.

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The History panel with notes/name, resolution/time, and shortcut key info displayed. Right-clicking on an image in the VFB history brings up a pop-up menu with some useful options.

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Image Info window 

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The redesigned V-Ray Frame Buffer includes a suite of color corrections and tools for adjusting the image. The tools are added as layers and displayed in a layer tree. You can enable or disable a particular tool using the visibility icon (). The  icon indicates that a layer is disabled. All layers have a vertical line marker for clear differentiation between fixed and flexible layers. Fixed layers are marked with a grey line, while newly added layers, which can be moved around freely and put into groups, are marked with a blue line.

Layers are only saved to .exr and .vrimg files written through V-Ray's own output. Note that the output in Render Setup > Common tab is written by 3ds Max so .exr files saved from there do not have Layers saved.

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Creates a layer. Multiple layers of the same type can be added.

Folder – Allows grouping multiple layers;
Background – Adds a background color correction layer;
Render Element – Selects a render element (with ability to apply mask on it) from your image that you can use in compositing. This is only available when the Source layer is set to Composite;
ICC Profile – Uses an ICC profile file for color corrections;
Constant – Adds a solid color that can be used to achieve an effect on another layer (for example to multiply by the constant);
Exposure – Adds an Exposure color correction layer;
White Balance – Adds a White Balance color correction layer;
Hue/Saturation – Adds a Hue/Saturation color correction layer;
Color Balance – Adds a Color Balance color correction layer;
Curves – Adds a Curves color correction layer;
Lookup Table – A Lookup Table layer allows loading a LUT file for color transformations;
Filmic Tonemap – Contains different types of mapping curves and gamma corrections. Also allows selection of a color space;
Integer mask element – Mask is used with integer render elements like VRayRenderID, VRayObjectID, and VRayMtlID Render Elements;
MultiMatte mask element – Mask is based on the MultiMatte Render Element;
Cryptomatte mask element – Mask is based on the VRayCryptyomatte Render Element;
Proportion Guide – Adds a proportion guide layer.

For more information, see the Layers page.

Deletes the selected layer(s).

Saves a layer tree preset.

Loads a layer tree preset.

Quick access to custom layer presets. You must set the path to it in the VFB Settings.

Undo various actions related to layers such as create, delete, reorder, or modify a layer.

Redo various actions related to layers such as create, delete, reorder, or modify a layer.

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CommandDescription
ResetResets all changes done to the selected layer.
SaveSaves the layer as a preset.
LoadLoads a preset for the selected layer.
DeleteDeletes the selected layer.
Save as LUTBakes all the color corrections to a LUT file.
New LayerCreates a new layer.
DuplicateDuplicates the selected layer.
Blend ModesSpecifies how the selected layer blends with the result from all layers below it.

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Example: How to use Cloud Collaboration to fast-forward design reviews in the cloud

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