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This page provides information about the V-Ray Image to Tiled Multiresolution EXR convertor converter standalone tool.
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Supported FormatsSupported input image formats are: V-Ray image file (*.vrimg) |
GUI UsageRunning img2tiledexr without any parameters |
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or from the Start menu |
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opens the GUI version of the tool, as seen |
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in the Overview section. The GUI allows you to convert one or a number of image files to tiled multiresolution OpenEXR files. Pixel type – Specifies whether the data in the .exr file is saved as 16-bit or 32-bit floating point numbers. Compression type – Sets the compression type, choosing between the several available methods. If not specified, the ZIP method is used.
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DWA compression level – A floating-point value that controls the compression level when using the lossy DWA compression methods. Linear – Specifies if the input image should be converted from sRGB to linear color space when saved into the tiled OpenEXR file. Possible values are: |
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off (no conversion), |
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on (convert colors from sRGB to linear space), |
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and auto (convert all images except .hdr and .exr files). Color Mode – Specifies whether to create a color EXR file (with RGB channels) or a grayscale EXR file (with Y channel). |
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When set to Auto, the image can be checked if it actually contains alpha and/or color data, and the output channels can be optimized, writing only the needed channels. Tile size – Sets the dimensions of a squared tile. Conversion type – Selects the type of conversion to be performed.
Input file – Specifies the image file when Single file is selected as the Conversion type. Input dir – Specifies the input files' directory when Multiple files is selected as the Conversion type. Output dir – Specifies the output directory for the tiled .exr files when Multiple files is selected as the Conversion type. Wildcard – Specifies a search pattern for the input file names. Wildcards (*) can be used to define the pattern. Subdirectories – When this option is enabled, all image files contained in subdirectories of the specified input directory are also converted. Convert – Starts the conversion. Command Line UsageThere are three methods for running the img2tiledexr from the command line: If you type just > img2tiledexr on the command line, this is the same as double-clicking the file. Converting a single image file to a single .exr file: > img2tiledexr <image_file> <exr_file> [options] In this case, the <image_file> cannot contain wildcards. Note that the .exr extension is not added automatically to the output file name. Converting multiple image files to multiple .exr files: > img2tiledexr <image_wildcard> [output_dir] [options] In this case, |
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<image_ |
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wildcard> can contain the wild-card symbols '*' and '?'; the image files |
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are automatically |
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converted to OpenEXR tiled multiresolution files with the .exr file extension. Optionally, you can specify |
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in <output_ |
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dir> the directory of the output files. If not specified, the output files |
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are written to the input directory. Caution! Under Linux and macOS, parameters with wildcards must be enclosed with apostrophe symbols - |
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'image_wildcard'. Otherwise, the command line shell |
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automatically expands the wildcard into the file list, which |
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forces the program to terminate. In all cases, the original image files are not deleted. |
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The postfix "_tiled" |
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is added to the file name |
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if you use wildcards. Note that many applications expect the colors in OpenEXR files to be in linear color space rather than sRGB/gamma 2.2 color space. |
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For this reason, |
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img2tiledexr automatically converts the colors in the input image from sRGB to linear space for all image file formats except .hdr and .exr images. You can use the -linear option to control this conversion. |
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OptionsOne or more of the following options may be specified:
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