Full 32-bit HDR in 2:1 Spherical Equirectangular format. The ZIP file contains a 4000x2000 HDR and a 8000x4000 JPEG. The JPEG can be used as the background when very high resolution output is required. Below is a test rendered scene. Should anyone require resolutions up to 13,000 pixels wide, please message olishea through the SketchUcation forum.