Physics: destructible geometry — runtime fracture / breakable objects / debris

[drsnuggles8]

Problem

No destruction system. There's no runtime mesh fracture, breakable props, glass, or debris (no Fracture / Breakable / Voronoi / Shatter anywhere). Terrain voxel / marching-cubes editing exists but is unrelated to rigid-body destruction.

Why it matters

Breakable cover/props and environmental destruction are core to the Far Cry feel (FC2 especially). Today every breakable would be a bespoke script.

Proposed approach

• Pre-fractured assets (offline Voronoi shatter into chunks) swapped in on break, with Jolt rigid-body debris + lifetime/fade.
• Break triggers from damage events / explosions (ties into the combat layer Gameplay: FPS combat layer — health/damage, weapons, hitscan/projectile #436 and fire Simulation: dynamic fire propagation / emergent material burn (FC2-style) #437); optional connectivity / structural support for collapses.
• Debris budget + pooling to bound cost.

Acceptance criteria

• A breakable object shatters into physical debris on sufficient damage; debris settles and is cleaned up within budget.

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Tier D — simulation richness.

Score

capability: 3
craft: 8
stability: 1
decay: 1
effort: 5
confidence: 0.5
learning: 3
fun: 3
kano: delighter
blocked_by: []
blocks: []

_{Rated per issue-scoring · score = confidence × (capability + craft + stability + decay) / effort, derived by the picker.}