quick substance designer node i once made to stitch a bunch of skyboxes in a presentable format in a reasonable amount of time. it's not great
Extract the skybox faces, turn them into usable colour images like PNG or BMP or whatever, link them to the appropriate inputs, then link an output...
Here is a collection of Substance Designer nodes I made for general purpose in making textures for TF2. I plan to expand this pack in the near future so stay tuned!
TF Brush Selector
TF Brush Splatter Generator
Base "Noises"
Warpaint Bases
Edge Mask
Material Preview
Blend...
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