EXRENVMAP(1) User Commands EXRENVMAP(1) NAME exrenvmap - convert exr image environment maps SYNOPSIS exrenvmap [options] infile outfile DESCRIPTION Convert an OpenEXR latitude-longitude environment map into a cube-face en- vironment map or vice versa. Reads an environment map image from infile, converts it, and stores the result in outfile. If the input file name contains a '%' character, then an input cube-face environment map is assembled from six square sub-images that represent the six faces of the cube. The names of the six image files are generated by replacing the % with +X, -X, +Y, -Y, +Z and -Z respectively. If the output file name contains a '%' character and the program has been instructed to produce a cube-face environment map, then the output image is split into six square sub-images that are saved in six separate output files. The names of the files are generated by replacing the % with +X, -X, +Y, -Y, +Z and -Z respectively. OPTIONS -o produces a ONE_LEVEL output file (default) -m produces a MIPMAP_LEVELS output file (-m has no effect if the output image is split into multiple files) -c the output file will be a cube-face environment map (default) -l the output file will be a latitude-longitude environment map -ci the input file is interpreted as a cube-face environment map, re- gardless of its envmap attribute -li the input file is interpreted as a latitudelongitude environment map, regardless of its envmap attribute (-li has no effect if the input image is assembled from multiple files) -w x sets the width of the output image to x pixels (default is 256). The height of the output image will be x*6 pixels for a cube-face map, or x/2 pixels for a latitude-longitude map. -f r n sets the antialiasing filter radius to r (default is 1.0) and the sampling rate to n by n (default is 5 by 5). Increasing r makes the output image blurrier; decreasing r makes the image sharper but may cause aliasing. Increasing n improves antialiasing, but generating the output image takes longer. -b blurs the environment map image by applying a 180-degree-wide filter kernel such that pointsampling the blurred image at a location that corresponds to 3D direction N returns the color that a white diffuse reflector with surface normal N would have if it was illuminated us- ing the original non-blurred image. Generating the blurred image can be fairly slow. -t x y sets the output file's tile size to x by y pixels (default is 64 by 64) -p t b if the input image is a latitude-longitude map, pad the image at the top and bottom with t*h and b*h extra scan lines, where h is the height of the input image. This is useful for images from 360-de- gree panoramic scans that cover less than 180 degrees vertically. -d sets level size rounding to ROUND_DOWN (default) -u sets level size rounding to ROUND_UP -z x sets the data compression method to x (none/rle/zips/zip/piz/pxr24/b44/b44a/dwaa/dwab/htj2k256/htj2k32, default is zip) -v verbose mode -h, --help print this message --version print version information REPORTING BUGS Report bugs via https://github.com/AcademySoftwareFoundation/openexr/issues or email security@openexr.com COPYRIGHT Copyright (C) Contributors to the OpenEXR Project License BSD-3-Clause OpenEXR 3.4.15 https://openexr.com August 2026 EXRENVMAP(1)
NAME | SYNOPSIS | DESCRIPTION | OPTIONS | REPORTING BUGS | COPYRIGHT
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