Utility to map an equirectangular (cylindrical projection; skysphere) map into 6 cube (cubemap; skybox) faces
sphere2cube is a script to map equirectangular (cylindrical projection, skysphere) map into 6 cube (cubemap, skybox) faces.
$ sphere2cube -h usage: sphere2cube [-h] [-v] [-r <size>] [-R <rx> <ry> <rz>] [-o <path>] [-f <name>] [-b <path>] [-t <count>] [-V] [<source>] Maps an equirectangular (cylindrical projection, skysphere) map into 6 cube (cubemap, skybox) faces. positional arguments: <source> source equirectangular image filename optional arguments: -h, --help show this help message and exit -v, --version show program's version number and exit -r <size>, --resolution <size> resolution for each generated cube face (defaults to 1024) -R <rx> <ry> <rz>, --rotation <rx> <ry> <rz> rotation in degrees to apply before rendering cube faces (z is up) -o <path>, --output <path> filename for rendered faces: default is "face_%n_%r", where %n is replaced by the face number, and %r by the resolution -f <name>, --format <name> format to use when saving faces, i.e. "PNG" or "TGA" -b <path>, --blender-path <path> filename of the Blender executable (defaults to "blender") -t <count>, --threads <count> number of threads to use when rendering (1-64) -V, --verbose enable verbose logging
Supported output formats depend on the Blender installation, but will generally include TGA, IRIS, JPEG, MOVIE, IRIZ, RAWTGA, AVIRAW, AVIJPEG, PNG, BMP, and FRAMESERVER.
sphere2cube can be run in a headless environment (e.g., a server).
For instance, to render a 2048-resolution TGA cubemap from source.jpg, we could use the following command:
$ sphere2cube source.jpg -r2048 -fTGA
This would generate face_1_2048.tga, …, face_6_2048.tga in the working directory.
sphere2cube can be easily installed with pip.
It assumes that Blender is installed and the blender executable is listed in the system PATH environment variable. If it is not possible for PATH to be edited (as in the case of an unprivileged user), the path to the blender executable may instead be passed through the -b flag.
Install Blender, and add blender.exe to PATH. Finally,
pip install sphere2cube
$ apt-get install blender $ pip install sphere2cube
Similar to Windows, install Blender, and add the blender executable to $PATH. Then,
$ pip install sphere2cube