Cloudy skybox by Pieter "Spiney" Verhoeven.
Source package: cloudy.zip, Cloudy skyboxes, last updated August 10, 2012.
License: CC-BY 3.0, https://creativecommons.org/licenses/by/3.0/
Converted from Quake-style JPG cubemap faces into Shadered Dimensions PNG faces with stitched edges.
