- The user saw a hard vertical line in Eleusis's sky. Cause: the lat-long paintings don't tile; the left edge is lighter than the right, so the wrap shows a seam.
- Fix (both Overcast and Cold Dusk): the first 12% of the width is a smoothstep crossfade from the image's end into its start, the end is dropped, and the result is resized back to 4096×2048. The edges now match.
- Replaced in Unity and on the NAS. The pre-fix finals are kept as *_before-seam-fix.png.