---
title: "V-Ray Frame Buffer"
canonical: "https://documentation.chaos.com/space/VRHINO/116129852/V-Ray%20Frame%20Buffer"
format: markdown
---
## **Overview**
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## **UI Paths**
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## **VFB Menu**
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| **Menu** | **Menu Options** | |
| --- | --- | --- |
| **File** | **Save current channel **– Saves the currently loaded channel to an image file format.
**Save all image channels to separate files **– Saves all the render elements to separate files. Use > Macro (inline-media-image)
to save the VFB color corrections to render elements.
**Save all image channels to a single file **– Saves the image to a multi-channel EXR or *.vrimg* file.
**Load image **– Opens an image file from disk to be previewed in the V-Ray Frame Buffer.
**Batch Image Processing** - Opens the Batch Image Processing menu.
**Upload image to Chaos Collaboration** – Opens the [Chaos Cloud Collaboration](https://docs-chaos.atlassian.net/wiki/spaces/VRHINO/pages/116130924) window.
**Enhance image on Chaos Collaboration** – Automatically exports the image to an EXR file in the Chaos Collaboration tab and from there you can send it for enhancement to Chaos Cloud Collaboration. Note that an [Enhancer Data](https://docs-chaos.atlassian.net/wiki/spaces/VRHINO/pages/153224970) render element must be added beforehand. To hide this function, you can use the **CHAOS_DISABLE_GEN_AI=1** Environment Variable.
**Upload image to Chaos Veras** – Uploads an image to [Chaos Veras](https://docs-chaos.atlassian.net/wiki/spaces/VRHINO/pages/860749977) for AI editing. | **Save all image channels to separate files options**
**Save VFB color corrections to render elements** – When enabled, all color corrections are saved to the render channels (as opposed to only the RGB and effectsResult channels).
---
**Batch Image Processing**
**Input folder** – Specifies a path to start images.
**Output folder **– Specifies a path for the output images.
**Layer preset **– Specifies a layer tree corrections preset.
**Output filenames suffix **– Specifies a suffix added to the output image filenames.
**Overwrite existing** – Enables overwrite of existing files with the same name in the output folder. |
| **Render** | **Start** **interactive** **rendering **– Starts Interactive Rendering.
**Stop rendering **– Stops the ongoing rendering at its current state. It takes the render's current state as valid to perform all post-rendering tasks such as post-effects, denoising or image output saving.
**Abort** **rendering –** Cancels the current render. When the render is cancelled, the output image is not saved.
**Render –** Starts Production Rendering. |
| **Image** | **Follow mouse** – Renders the closest bucket 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.
**Follow mouse** – Drag the mouse over the VFB while rendering to change what part of the image is sampled first;
**Follow mouse (locked**) – Locks the bucket (or sampling) starting point.
**Copy current channel to clipboard** – Copies the current channel to the clipboard.
**Clear image** – Clears the contents of the frame buffer. This is useful when starting a new render to prevent confusion with the previous image. |
| **View** | **Display color space** –Specifies the color space, in which the image is displayed.
**None** – Does not specify a color space;
**sRGB** – Displays the image in sRGB color space;
**OCIO** – Displays the image in a color space loaded from an OCIO configuration file;
**ICC** – Displays the image in a color space loaded from an ICC configuration file;
**Gamma** **2.2** – Displays the image in Gamma 2.2 color space.
**Zoom VFB** – Zooms in/out the rendered image in the VFB.
**Zoom 50%** – Zooms out to 50%;
**Zoom 100%** – Zooms to 100%. Alternatively, double-click in the VFB with the left mouse button;
**Zoom 150%** – Zooms in to 150%.
**Zoom to fit** – Zooms in or out so to position the image properly within the V-Ray Frame Buffer.
**Channels** – Chooses which channels to display.
**View red channel** – Displays the red channel;
**View green channel** – Displays the green channel;
**View blue channel** – Displays the blue channel;
**Switch to alpha channel** – Displays the alpha channel;
**Monochromatic mode** –Displays the image in monochromatic mode.
**Test resolution** – Enables test resolution in VFB. The submenu allows choosing a percentage of the render resolution to set as the test resolution. You can choose between 10%, 25%, 50%, 75%, 110%, 125% and 150%. Note: This only affects V-Ray and does not affect the native 3ds Max test resolution setting found under 3ds Max's Render Setup dialog.
**Color clamping **– Opens the color clamping submenu options:
**Force color clamping** – Forces color clamping;
**View clamped colors** – Displays the clamped colors.
**Use pixel aspect** – Enables visualization of the pixel aspect ratio.
**Flip** – Mirrors the image in the VFB. This is a view only option, the flipped image cannot be exported. This function is only active while holding the menu button or the hotkey for the corresponding type of flip. The effect does not interrupt interactive rendering.
**Flip horizontally **– Mirrors the image horizontally.
**Flip vertically** – Mirrors the image vertically.
**Panorama View** – Shows the image in a 360° view. > Macro (anchor)
**Show History** – Shows the History panel.
**Show Layers** – Shows the Layers panel. |
| **Options** | **VFB settings** – Opens the [VFB Settings](https://docs-chaos.atlassian.net/wiki/spaces/VRHINO/pages/116130878) window, where you can adjust settings for Render View, Render Region, History, and Layers. |
## **VFB Toolbar**
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|  | This dropdown gives access to [render elements](https://docs-chaos.atlassian.net/wiki/spaces/VRHINO/pages/116130014) rendered for the scene. The selected render element is displayed in the VFB. By default, the RGB and Alpha render elements are available. Any additional render elements that have been added to the scene also appear in the drop-down. |
| --- | --- |
|  | Displays the coordinates of the mouse pointer. |
|  | Specifies the sampled area size. Click on the arrow to open a context menu with the available sampled area sizes: 1x1, 3x3, 5x5, and 7x7. |
|  | Specifies whether color and display corrections are applied (RGB) or not (Raw) when showing the sampled pixel values at the current mouse pointer position. |
|  | Displays the RGB pixel values at the current mouse pointer position before applying any color corrections. |
|  | Specifies RGB values. Click on the arrow to open a context menu with the available options.
**None** – Does not specify the RGB value.
**HSV** – Specifies the Hue, Saturation, and Value of the pixel under the current mouse position.
**Web** – Specifies the HEX of the pixel under the current mouse position.
**8bit** – Specifies the 8bit color palette of the pixel under the current mouse position. |
|  | Displays the Hue, Saturation, and Value of the pixel under the current mouse position when **HSV** is selected. |
|  | Displays the HEX of the pixel under the current mouse position when **Web** is selected. |
|  | Displays the 8bit color palette of the pixel under the current mouse position when **8bit **is selected. |
|  | Locks the mouse pointer coordinates and displays information for the selected pixel. |
| --- | --- |
|  | Shows corrected colors. |
|  | Shows the V-Ray log. |
|  | Displays the Red channel. |
|  | Displays the Green channel. |
|  | Displays the Blue channel. |
|  | Displays the Alpha channel. |
|  | Uploads an image to Chaos Veras. |
|  | Automatically exports the image to an EXR file in the Chaos Collaboration tab and from there you can send it for enhancement to Chaos Cloud Collaboration. Note that a VRayEnhancerData render element must be added beforehand. To hide this function, you can use the **CHAOS_DISABLE_GEN_AI=1** Environment Variable.
> ✅ Chaos AI Enhancer uses **Chaos Credits**. *For more information, see **[Chaos Credits](https://docs-chaos.atlassian.net/wiki/spaces/LIC5/pages/860160024)** documentation.*
> ℹ️ The width or height of the rendered image for the AI Enhancer to work must be no less than 512px.
> ℹ️
> ℹ️ If the resolution is from 512px to 3840px, the image for enhancement is upscaled to 4096px.
> ℹ️
> ℹ️ If the resolution is from 3840px to 4096px, the rendered image is passed to the enhancer as-is.
> ℹ️
> ℹ️ If the resolution of the rendered image is higher than 4096px, the **Enhance image on Chaos Collaboration **button receives an indicator () showing that the image exceeds the maximum enhancement size and will be automatically scaled down on the longer side in Chaos Cloud Collaboration.
> ℹ️
> ℹ️ If the resolution of the rendered image is higher than 16384px, the **Enhance image on Chaos Collaboration** button becomes greyed out and a warning about the unsupported image size appears. |
|  | 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; Use > Macro (inline-media-image)
to save the VFB color corrections to render elements.
**Save all image channels to single file **– Saves the image into a single multi-channel EXR or *.vrimg* file.
**Upload image to Chaos Collaboration** – Opens [Chaos Cloud Collaboration](https://docs-chaos.atlassian.net/wiki/spaces/VRHINO/pages/116130924). |
|  | 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 bucket 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. |
|  | Allows you to render regions in the VFB. *See the **[Render Region](https://docs-chaos.atlassian.net/wiki/spaces/VRHINO4EDIT/pages/114406626)** section for more information.* |
|  | Starts Interactive Rendering. |
|  | Stops the current rendering. Right-click and hold to open the drop-down menu.
**Abort rendering** – Cancels the current render. When the render is cancelled, the output image is not saved.
**Stop rendering** – Stops the ongoing rendering at its current state. It takes the render's current state as valid to perform all post-rendering tasks such as post-effects, denoising or image output saving. |  |
|  | Starts Production Rendering. |
> Macro (anchor)
## **Render History**
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### **Right-Click Menu**
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### **Save History Images To Files**
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## **Filters**
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The V-Ray VFB provides a variety of filter presets in the Filter panel. The presets previews in the Filter panel allow for quick and easy comparison of multiple color correction scenarios.
> Macro (inline-media-image)
– Opens the Filter/Layer preset dropdown menu. Once applied, the filter preset folder is added as a folder at the top of the Layer tree in the Layers right tab. Additional custom modifications can be made on the layers and the compiled setup can be saved as a Layer tree preset by **right-clicking** on the top preset folder and selecting **Save**. The preset is saved as a *.vlpdir *file.
The filters are applied by one of the following actions:
- double-click on the preview
- click the Load to VFB button
- right-click > Load layers option
Preview thumbnails update automatically on render end. The **Reload thumbnails** button refreshes the thumbnails, alternatively you can right-click on a thumbnail and select **Refresh thumbnail**.
Applying a new default filter overrides the current top preset folder in the Layer tree with the new corrections, so it is not possible to keep multiple default filters active at the same time. However, imported Layer preset with a different name can be stacked with one default filter.
Change presets directory from V-Ray Frame Buffer > Options menu > VFB Settings > Filter/Layer presets > Path.
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## **Histogram**
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## **Layers**
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### **Save and Load Layer Presets**
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There are several types of layer presets: presets for a single layer, presets for a folder of one or more layers, and presets for a full layer tree. You can also load a legacy preset for global color corrections (vccglb) saved with the previous VFB 1 available in earlier V-Ray versions.
> ℹ️ You can only load vccglb preset files via the **Load layer tree preset** ()** **button, but you cannot save them with the new VFB.
The preset for a full layer tree (vfbl) can be saved or loaded from the respective **Save layer tree preset **() and **Load layer tree preset** ()** **buttons in the Layers tab.
The presets for a folder (vlpdir) can be saved and loaded from the context menu of a folder. Such presets can also be loaded or previewed from the Layer/Filter presets menu if it points at its location or through the **Load layer tree preset **() button.
The presets for a single layer (vlpct, vlpexp, vlpwb, vlphsl, vlpcl, vlpcrv, vlplut, vlptm, vlpicc, vlpvgnt, vlpsrc, vlpdzr, vlpshb, vlplfx) can be saved or loaded from the context menu of an existing layer: right-click on the layer and select **Save **or **Load**.
The following presets for single layers are available:
**vfbl **– A preset for a full layer tree.
**vlpdir **– A preset for a folder of one or more layers. The vlpdir presets are saved from the context menu of a folder.
**vlpct **– A preset for a single Constant layer. Can be saved from the context menu of the Constant layer.
**vlpexp **– A preset for a single Exposure layer. Can be saved from the context menu of the Exposure layer.
**vlpwb** – A preset for a single White Balance layer. Can be saved from the context menu of the White Balance layer.
**vlphsl **– A preset for a single Hue/Saturation layer. Can be saved from the context menu of the Hue/Saturation layer.
**vlpcl **– A preset for a single Color Balance layer. Can be saved from the context menu of the Color Balance layer.
**vlpcrv **– A preset for a single Curves layer. Can be saved from the context menu of the Curves layer.
**vlplut **– A preset for a single Lookup Table layer. Can be saved from the context menu of the Lookup Table layer.
**vlptm **– A preset for a single Filmic tonemap layer. Can be saved from the context menu of the Filmic tonemap layer.
**vlpicc **– A preset for a single ICC profile layer. Can be saved from the context menu of the ICC profile layer.
**vlpvgnt **– A preset for a single Vignette layer. Can be saved from the context menu of the Vignette layer.
**vlpsrc **– A preset for a single Source layer. Can be saved from the context menu of the Source layer.
**vlpdzr **– A preset for a single Denoiser layer. Can be saved from the context menu of the Denoiser layer.
**vlpshb **– A preset for a single Sharpen/Blur layer. Can be saved from the context menu of the Sharpen/Blur layer.
**vlplfx **– A preset for a single Lens Effects layer. Can be saved from the context menu of the Lens Effects layer.
## **Stats**> Macro (anchor)
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## **Log**
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## **VFB Shortcuts**
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| **Mouse** | **Description** |
| --- | --- |
| Mouse wheel | Zoom in/Zoom out |
| Double-click left button | Zoom to 100% |
| Page Up/Page Down | Switch between render elements |
| Middle button dragging | Pan (hand tool) |
| | |
| **Keyboard** | **Description** |
| + / = | Zoom in |
| -/_ | Zoom out |
| * | Zoom to 100% |
| Arrow keys | Pan left, up, right, down |
| F | Fit the region or the whole image. Available only if the render region option is used. |
| Esc | Abort render |
| Q | Enable history A/B vertical compare mode. |
| W | Enable history A/B horizontal compare mode. |
| E | Enable history A/B/C/D compare mode. |
| 1-9 | Load the respective image from the VFB2 history |
| H | Show/hide history |
| L | Show/hide whole right panel |
| P | Show/hide only layers tree |
| S | Show/hide settings |
| F11 | Toggle fullscreen |
| Ctrl+C | Copy the VFB image to the Windows clipboard; the image is copied exactly as it appears on the screen (meaning sRGB/LUT/OCIO etc corrections are applied). The full resolution image is copied to the clipboard, even if the VFB view is zoomed in/out. |
| H; Ctrl+[ | Show/hide history |
| Ctrl+L; Ctrl+] | Show/hide right panels |
## **Render Region**> Macro (anchor)
---
Region rendering can be used in both Interactive and Production modes to isolate only part of the frame for rendering. Usually, when a render region is used, you would like to save the whole frame instead of the region only.
When saving single-channel .*exr *files, the render region is ignored and a full frame is always saved. This applies when saving the .*exr* through **VFB.**
Saving .*exr* files, using the Render Output option of the Asset Editor, writes just the render region data in the file by default. The rest of the frame is rendered black.
Saving .*exr* files from **VFB** >** Save all image channels to single file **saves the render region on top of the previously rendered frame.
## **Notes**
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- The VFB does **not** display the G-Buffer layers (like **Coverage,** etc.).
- The VFB does **not** work with strip rendering.
- The VFB does **not** work with rendering to fields.
- The OpenEXR file format is an open file format for high dynamic range images originally developed by Industrial Light and Magic. The official site of the OpenEXR file format is [http://www.openexr.com/](http://www.openexr.com/)
- If Lens Effects or the VRayDenoiser render element are enabled, then the RGB Color channel is saved with the name RGB_color and the effectsResult channel is saved as effectsResult when saving all channels from VFB.
- If an 8-bit file is saved through the VFB or the Render Output / Save image settings, the color space (for example sRGB) is embedded and the image appears as in the frame buffer when loaded in an external image viewer. If a 32-bit (exr, hdr, tif) image is saved, it remains linear and relies on the external image viewer to handle the display color space.
- **Unexpected behavior of the VFB window may occur when using Windows 8.1 OS.**
- The Log tab at the right panel of the V-Ray Frame Buffer tracks the render process only. The Log Window includes the same information about the render process in combination with messages from the rest of V-Ray (host-app communication, UI, etc.)
- In case Filters are unavailable due to an incorrect or invalid path, reset the VFB by navigating to the V-Ray menu: Preferences > Reset VFB State.