This page provides information about the Images tab of the V-Ray Renderer node.

 

Overview


Images tab of the V-Ray Renderer node presents settings for the rendered image output. 

 

UI Path


 

||out Network|| > V-Ray > V-Ray Renderer > Images tab

 

Parameters


 


Show Frame Buffer – Opens up the V-Ray Frame Buffer.

Previous Render – A number of options how to clear the previous rendered image when starting a new render reside here. You can choose between Don't Clear, Cross, Fields, Darken, Tint Blue, and Clear to Black.

Save Image – When enabled, an image is saved at the specified File Path location.

File Path – Specifies the location where the image is saved. Supports the following extensions .png, .jpg, .tiff, .tga, .sgi, .exr, and .vrimg. A file without one of these extensions is given an .exr extension by default.

Templates – Specifies the render channel template from Back to Beauty, Back to Beauty Adv, and All Elements.

Generate – Generates render channels from a template.

Network – Specifies the V-Ray Render Elements ROP to use with the current Renderer. Multiple V-Ray Renderer nodes can link to the same Render Elements node.

Store Beauty Pass Under a Separate Folder – When enabled, it stores the Beauty pass in a separate RGBA folder. 

 ${AOV} or only $AOV can be used to mark where RE.name will be placed in the filename. It can be used as a folder name too. 

If there is no ${AOV}/$AOV tag specified and the render element supports any multichannel format, it is written in a multichannel format (.exr for example).

 

Advanced


 



Memory Frame Buffer – Tells V-Ray how to utilize the VFB when rendering to .vrimg or .exr.

None – Doesn't display the image to minimize memory usage.
Full – No memory optimization.
Preview – Displays a lower resolution of the image to minimize memory usage.

Write Deep Data – When enabled, writes deep output into the rendered image.

Don't Save RGB Channel – When enabled, the RGB channels is not saved (ignored with multichannel exr and vrimg).

Don't Write Alpha Channel – When enabled, the Alpha channels are not saved (ignored with multichannel exr and vrimg).

Separate Alpha Channel File – When enabled, the alpha channel of the rendered image is saved to a separate file.

Save Velocity 0-Base – When enabled, it saves the velocity channel with zero base instead of the default 0.5 based. 

Frame Stamp – Turns the frame stamp on and off.

Stamp Text  The keywords used to render the stamp tokens or keyboards (see table below).  These keywords are replaced by V-Ray with the corresponding value:

 

KeywordInformation rendered
%vrayversionCurrent version of V-Ray
%filenameName of the current scene file
%frameNumber of the current frame
%primitives *Number of unique intersectable primitives generated for the current frame*
%rendertimeRender time for the current frame
%computernameNetwork name of the computer
%dateCurrent system date
%timeCurrent system time
%wWidth of the image in pixels
%hHeight of the image in pixels
%cameraName of the camera for this frame if rendering from a camera (if not rendering from a camera, an empty string)
%ramAmount of physical memory (in KBytes) installed on the system
%vmemAmount of virtual memory (in KBytes) available on the system
%mhzClock speed of the system CPU(s)
%osOperating system

 

Image Format


Contains parameters relevant to the currently selected output image format.

 

 

 

CompressionAllows you to choose compression level for the resulting file. Lower values mean less compression and larger file size. Higher values mean better compression and smaller file sizes. Note that PNG files use a lossless compression, so the resulting image quality is not affected.

Bits Per ChannelThe number of bits for each of the PNG channels (red, green, blue, alpha).

 

 

QualityAllows you to choose the desired JPEG output quality. Lower values represent smaller file size and worse quality; higher values represent larger file size and better image quality.

 

 

Bits per Channel – Specifies the desired number of bits per channel (8, 16 or 32) in the resulting image.

Interleaved Color Channels – When enabled, the color information for each pixel is saved using the Interleaved order which means that the full color for each pixel is saved before moving to the next one. Some image processing applications require that the image is saved in this mode.

 

 

Compression – Specifies compression options for the resulting image.



Bits per Channel – Specifies the desired number of bits per channel (8 or 16) in the resulting image.

 

 

Compression – Allows you to choose the compression type for the output file:

Default
No compression
 – Disables all compression. 
Run-length – Basic form of compression that is comparable to the one used by Targa/BMP files.
Scanline ZIP – Zip style compression applied to individual scanlines.
Block ZIP – Zip style compression applied to blocks of 16 scanlines at time. More effective then Scanline Zip, but can be slower to decompress.
PIZ – Uses a new combined wavelet / Huffman compression. This form of compression is quite effective when dealing with grainy images, and often surpasses any of the other options under grainy conditions.
PXR24 – Converts data to 24 bit then uses Zip compression. It is lossless for half and 32bit integer data and slightly lossy for 32bit float data.
B44 – This form of compression is lossy for half data and stores 32bit data uncompressed.
B44A – An extension to B44 where areas of flat color are further compressed. Regular B44 compresses uniformly regardless of image content.
DWAA – JPEG-like lossy compression format. Compresses 32 scanlines together.
DWAB – Same as DWAA, but compresses blocks of 256 scanlines to achieve better compression ratio.

Bits per Channel – Allows you to choose between 16-bit (half float) and 32-bit (full float) precision.

Data Window – Determines what data window information is written to OpenEXR files. This option works only when the Memory frame buffer option of V-Ray is set to Full.

Render Region – Sets the data window to the render region.
Auto – The data window is determined from the pixels that have non-zero alpha values.
Whole Image – Sets the data window to the image resolution.

Write Integer IDs (non multi-channel files only) – When enabled allows you to write ID information in integer form rather than RGB colors.

Write Multi-part EXR (multi-channel files only) – When enabled, multichannel EXRs are written to a single multi-part file. This feature requires OpenEXR 2 support.

Deel Alpha Colors – A data window for scanline-based multichannel OpenEXR files. The available options are Monochrome, RGB, and Monochrome + RGB.

Extra Attributes – Allows you to specify additional attributes for the OpenEXR file. These are of the format attr1=val1;attr2=val2;... where the values can be either integer or floating-point numbers, or lists of numbers in brackets representing vectors, matrices etc. For example: 

int_attr=53;float_attr=3.14;vec4_attr=(1, 2, 3, 4)

If a value cannot be recognized as a number or a sequence of numbers, it is assumed to be a string value.

 

 

Compression – Specifies compression options for the resulting image.

Bits per Channel – Specifies the desired number of bits per channel (16 or 32) in the resulting image.

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