Why re-bake to UV2? . This UV1 is the most efficient use of texture space and geometry for both spheres and sky domes . I do it same way for decades. it could lod up to cube like shape, basically a subdivided cube with a seam along equator , have proper distribution of texel size , mips properly etc. just calculate how…
Hmm I think it's this game? A lot of the jaggies seem to be from low-rez geometry for the spell FX. Though the textures do get blown up pretty large too. https://www.youtube.com/watch?v=uY206fXsa8o?t=252 I'd suggest trying a test of just Bilinear upscaling the texture to 2k, and adding some noise. See how big the pixels of…