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changes.mady.by.user Kristina Gaytandzhieva

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

VFB is much more than a render image holder. 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 8-bit and 32-bit 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 for rendered image and its elements;
    Composite mode for Back to Beauty workflow including layers corrections;
    LightMix control on lights contribution in 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;
    Allows you to choose the order in which the buckets are rendered;
    Automatic render resolution adjustment in IPR when the VFB window is resized;

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

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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 quick access.

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Locks the mouse pointer coordinates and displays information for the selected pixel.

Shows corrected colors.

Shows the V-Ray log.

Displays the Alpha channel.

Displays the red channel.

Displays the green channel.

Displays the blue channel.

Saves the image to disk. Press and hold the icon to bring up the submenu:

Save current channel – Saves the current channel to an image file format;
Save all image channels to separate files – Saves all the render elements into separate files;
Save all image channels to single file – Saves the image into a single multi-channel EXR or .vrimg file.

Clears the contents of the frame buffer. This is useful when starting a new render to prevent confusion with the previous image.

Renders the closest buckets found to the mouse pointer, when using the bucket image sampler. If the progressive sampler is used, V-Ray samples the closest pixels to the mouse pointer. With this option enabled, you can right-click on the image and select Lock bucket starting point to lock the bucket (or sampling) starting point.

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Enables/disables test resolution in the VFB. Press and hold to bring up the submenu to select the percentage of the render resolution to set as the test resolution.

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Image Modified

Allows you to render regions in the VFB. See the Render Region section for more information.

Image Modified

Starts IPR.

Image Modified

Stops the current rendering.

Image Modified

Starts rendering.



Render History

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The V-Ray Frame Buffer keeps a history of previously rendered images, and lists each with a number, thumbnail, and textual details in the Render history panel. Up to four images can be called from the history to be compared in the VFB (as shown in this section). History files are stored as .vrimg files in a user-specified folder. Render history settings can be configured in the VFB Settings window.

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For more information on using the Layers, see the Layers page.

 

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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 from your image that you can use in compositing. This is only available when the Source layer is set to Composite;
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.

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 create layer.

Redo create 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 all CCs 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. See the Layers page for more info on the types of Blend Modes.
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Stats

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The V-Ray Frame Buffer allows monitoring of different statistics and information about your scene in the Stats panel. The exact contents of the Stats changes depending on the scene,  the rendering mode (interactive vs production, bucket vs progressive) and others.

UI Text Box
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Right-click to display a context menu, allowing you to copy the Stats values.

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Render Region

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Region rendering can be used in both IPR and Production modes to isolate only part of the frame for rendering.

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