Brainstormed 2026-05-08 over 8 design questions. Captures:
- Texture model: sampler2DArray for ALL textures (1-layer wrap for
per-instance composites). Matches WB's modern shader, future-proofs
for atlas adoption in N.6+.
- Translucency: WB's two-pass alpha-test (no native Additive on GfxObj
surfaces; falsifiable at visual verification).
- Data delivery: all-SSBO. Instances[] at binding=0, Batches[] at
binding=1. Indexed by gl_BaseInstanceARB+gl_InstanceID and
gl_DrawIDARB respectively.
- Bindless residency: resident on upload, never release. Bounded
content; instrument under ACDREAM_WB_DIAG=1.
- Escape hatch: two-way flag preserved. N.5 replaces N.4's draw method
in place; legacy InstancedMeshRenderer remains the safety net.
- Perf measurement: CPU stopwatch + GL_TIME_ELAPSED queries, logged
via [WB-DIAG]. Acceptance gates pasted into SHIP commit.
- Persistent-mapped buffers: deferred to N.6.
- Per-instance highlight (selection blink): deferred; field reserved
in InstanceData for Phase B.4 follow-up.
Spec at docs/superpowers/specs/2026-05-08-phase-n5-modern-rendering-design.md
covers architecture, components, per-frame data flow walk-through,
translucent rendering, error handling + fallback, testing + acceptance,
risks, and explicit out-of-scope list. Plan + task breakdown comes next.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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