The letters are the names of the 6 skybox faces. Here are some images to visualize what these plugins do: That will open up a window listing everything that the plugin will add to the software.
You will need to convert the images to some other file format (like EXR) and use more advanced software than Paint.NET. exe file to start the installation wizard. Note: If you want to play with HDR skyboxes, don't use these plugins. (This is what 3D models of spheres use.) Equirectangular maps have very little distortion at the horizon line, but extreme distortions at the poles.Īll this means is that the top face of your skybox will need to be made in cube mode regardless.Īs an example, a simple vertical gradient can be easily made in equirectangular mode and then converted to a perfect skybox in a matter of seconds.
With my plugins you can now also project the image onto an equirectangular map of a sphere. Having distortions everywhere in all directions makes it hard to paint a skybox that doesn't obvously look like a cube. This keeps distortions under control, but makes them appear everywhere. Valve decided to project the image onto a cube first. There is of course the catch that skyboxes can't be projected onto a flat image without distortions.
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