09. Equirectangular what?

Check out this this article on Equirectangular Projections

Why does an equirectangular projection give you extra data at the poles? Would this be an issue for 360 films? Open up Unity, and find a free equirectangular projection photo online. Convert that projection into a cube map skybox.

Most 360 films are saved in the equirectangular format, so it’s important to understand what it means for your footage.