Extensive tutorial explaining the basic process of
making a simple Skybox Scene to render an Environment Map using Blender Internal (https://www.katsbits.com/tutorials/blender/render-skybox.php). Covers the basic process from start to finish including details on Material set-up where transparency is required. Source sample file available. Watch video here (https://www.katsbits.com/smforum/index.php?topic=782.0). An eBook version is optionally available in store (https://www.katsbits.com/store/index.php?act=viewProd&productId=53).