Duke3D: DEF Skyboxes are loaded into memory twice
Originally reported here: https://forums.duke4.net/topic/10653-skyboxes-loading-twice-in-polymost-but-not-in-polymer/
I don't know if this is an expected result of the "Polymost sky Z buffer hack" from SVN commit r7415 (commit: 74b3c44e) but ever since this commit, each texture of the defined DEF skybox faces (https://wiki.eduke32.com/wiki/Skybox_(DEF)) is loaded twice, resulting in a noticeable stutter when a face needs to be loaded.
In the attachment you'll find a skybox grp as well as 2 compiled builds to compare. They aren't available on synthesis so I decided to include them too. Run the batch files and the game will start directly in E1L1 to demonstrate the issue. Checking the console/log will reveal that the faces are loaded twice, doubling the total load time.