cube2sphere is a Python script to map 6 cube (cubemap, skybox) faces
into an equirectangular (cylindrical projection, skysphere) map. See
also sphere2cube.
$ cube2sphere -h
usage: cube2sphere [-h] [-v] [-r <width> <height>] [-R <rx> <ry> <rz>]
[-o <path>] [-f <name>] [-b <path>] [-t <count>] [-V]
<front> <back> <right> <left> <top> <bottom>
Maps 6 cube (cubemap, skybox) faces into an equirectangular (cylindrical
projection, skysphere) map.
positional arguments:
<front> source front cube face filename
<back> source back cube face filename
<right> source right cube face filename
<left> source left cube face filename
<top> source top cube face filename
<bottom> source bottom cube face filename
optional arguments:
-h, --help show this help message and exit
-v, --version show program's version number and exit
-r <width> <height>, --resolution <width> <height>
resolution for rendered map (defaults to 1024x512)
-R <rx> <ry> <rz>, --rotation <rx> <ry> <rz>
rotation in degrees to apply before rendering map (z
is up)
-o <path>, --output <path>
filename for rendered map (defaults to "out")
-f <name>, --format <name>
format to use when saving map, 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.
cube2sphere can be run in a headless environment (e.g., a server).
If we wanted to stitch 6 cube faces named ${face}.jpg into a 2048x1024
TGA equirectangular map, we could use the following command:
$ cube2sphere front.jpg back.jpg right.jpg left.jpg top.jpg bottom.jpg -r 2048 1024 -fTGA -ostitched
This would generate stitched.tga in the working directory.
cube2sphere can be easily installed with pip. It requires a Python 3 installation.
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 cube2sphere
$ apt-get install blender
$ pip install cube2sphere
Similar to Windows, install Blender, and add the blender executable
to $PATH. Then,
$ pip install cube2sphere
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