All procedural, client-only, observe-only in PresentationSystemGroup, zero
netcode surface (read existing replicated state). Shared FeedbackFx decal
primitives (scorch blob + crack star meshes + transparent decal material).
ScorchDecalSystem: static RequestScorch queue -> pooled fading discs
(mirrors DynamicLightSystem), wired from the barrel boom, reusable by the
geyser. CoverDamageSystem: crack accretion keyed on BlightClutter.Remaining
(Variant 4) + proximity-gated shatter-scorch. RoomDressingSystem: persistent
arena scars on a distinct hash sub-stream, torn down with dressing. Knobs in
DecalConfig. Cover cracks use decals (not URPMaterialPropertyBaseColor) because
the Synty prop shader is not Hybrid-Per-Instance.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
