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Erik fcaff71352 docs(A.5): two-tier streaming + horizon LOD design spec 
Brainstorm output for Phase A.5. Locks key decisions:
- Hardware target: 240 Hz / 1440p, 4.166ms vsync budget
- Tier radii: N₁=4 (full detail, 81 LBs), N₂=12 (terrain only, 544 LBs)
- Far-tier strategy: terrain-only + fog blend at N₁ (zero engineering cost)
- Bucketing: tighten existing per-LB walk (Q5 Option A); persistent
  groups deferred to a later phase
- Worker thread: single-thread mesh build off render path (Q6 Option A)
- Hysteresis: existing radius+2 convention applied to both tiers
- Visual ride-alongs: mipmaps + anisotropic + A2C/MSAA + depth-write audit
- Acceptance: 240Hz standstill / 144 FPS walking (Q9 Option B)

Spec at docs/superpowers/specs/2026-05-09-phase-a5-two-tier-streaming-design.md.
Awaiting user review before transitioning to writing-plans.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
2026-05-09 21:52:00 +02:00
..
2026-04-11-foundation-phase-design.md docs: refresh strategic roadmap + Foundation phase design spec 2026-04-11 21:43:33 +02:00
2026-04-12-b3-complete-movement-design.md docs(specs): Phase B.3 Complete — movement and world navigation design 2026-04-12 15:54:12 +02:00
2026-04-12-physics-collision-engine-design.md docs(specs): Phase B.3 — physics collision engine design 2026-04-12 09:42:31 +02:00
2026-04-12-player-movement-design.md docs(specs): Phase B.2 — player movement mode design 2026-04-12 14:05:07 +02:00
2026-04-13-movement-completion-design.md docs: movement completion design spec (B.2/B.3) 2026-04-13 23:01:18 +02:00
2026-05-02-l3-remote-entity-motion-design.md docs(spec): Phase L.3 scope revision — combine L.3.1+L.3.2 2026-05-03 10:03:09 +02:00
2026-05-08-phase-n-worldbuilder-migration-design.md spec(rendering): Phase N WorldBuilder migration design + N.1 scenery 2026-05-08 08:47:23 +02:00
2026-05-08-phase-n1-scenery-via-wb-helpers-design.md spec(rendering): Phase N WorldBuilder migration design + N.1 scenery 2026-05-08 08:47:23 +02:00
2026-05-08-phase-n4-rendering-foundation-design.md spec(N.4): rendering pipeline foundation design 2026-05-08 12:47:49 +02:00
2026-05-08-phase-n5-modern-rendering-design.md phase(N.5): retirement amendment — InstancedMeshRenderer + StaticMeshRenderer + WbFoundationFlag deleted 2026-05-08 22:01:36 +02:00
2026-05-09-phase-a5-two-tier-streaming-design.md docs(A.5): two-tier streaming + horizon LOD design spec 2026-05-09 21:52:00 +02:00
2026-05-09-phase-n5b-terrain-modern-design.md spec(N.5b): design for terrain on the modern rendering path 2026-05-09 08:23:09 +02:00