[vaprdev]

Summary

On octant terminals, diagonal edges (mountain slopes, pine tiers, roofs) stair-stepped in 2×4 blocks. src/smooth.ts adds the Unicode 16 mosaic wedges and eighth blocks: for a high-contrast cell, refineEdge() fits the octant's two colors along the edge and takes a wedge or eighth glyph when it clearly explains the cell better. WALLPAPER_SMOOTH=0 turns it off; dev/cells.ts renders the new glyphs.

 fit cell
   band on soft cells (gradient-cells)
-  octant
+  octant, or a smooth wedge/eighth on a still, clean edge   # refineEdge()

Refinements applied:

• Wedges stay off the sun and moon (Canvas.orbs, recorded by paintSky and desert's sky): the disc keeps its octants instead of a polygon outline with a dark notch.
• Stricter fit: a wedge must beat the octant by 15% overall and be no worse on any sub-pixel, so pine tiers and thin rim-lit ridges lose their notches.
• Only still cells take wedges (a gliding edge would flip between wedge and octant), and the moving-cell hysteresis is eased to 1.1× so snow stays well under the flicker limit.

Evidence

After the refinements, origin/main (left) vs this branch (right), tundra night preview: pine tiers and the round moon.

Cost, dev/check.ts tundra ocean city jungle back to back twice: 7.47 → 7.68 ms/frame. Worst flicker 87 → 86 cells.

Verified: typecheck, build, dev/check.ts --max-ms=60 in octant and quadrant mode (0 failed), --verify-dirty 90/90, screenshots up to date.

Merge Danger

Door: two-way

Blast Radius: octant terminals; terminals whose font lacks the Unicode 16 wedges would show missing glyphs (WALLPAPER_SMOOTH=0).