Python script to generate skybox image maps in rectangular format from equirectangular images, as well as a setup for Blender to render equirectangular image maps.

With the Blender setup, an equirectangular HDRI can be rendered from a 3D environment, like the following:

.. to then convert this into a cubemap with the Python script…

… so that this can be used in game engines like Verge3D or Goldsource.