This was an attempt by me to recreate the original Deathmatch Classic forest skybox from the source images I found. My aim was to match the original geometry of the source skybox as much as possible. This is a combination of extensive GIMP work and AI upscaled versions of the original for the up and down parts.
Special thanks to Jasper Carmack for the original source images found here:
https://twhl.info/vault/view/6893
Original photos were taken by Geoff Holman.
Modified the brightness/contrast to match the original more, also improved blending with the bottom part.
Modified areas of transition that had artifacts, and erased some erroneous pixels from the tree lines.