Reflection probes: recapture only on change (idle scheduler, content/env dirty) #772

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opened 2026-10-15 01:09:38 +00:00 by sky_line · 1 comment

sky_line commented

2026-10-15 01:09:38 +00:00

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Today (clean_probe_gpu.comp, setProbes in llcleanrenderervk.cpp)

"Dirty" = probe origin moved > 1 m or radius changed > 15% -> only a +4 priority boost, not a gate.
Per-cell content hash re-places probes when cell bounds change; it does not force a recapture.
Environment change > 0.05 on the atmos lanes ages every capture (full nearest-first recapture); day-cycle drift repeats it.

Goal: recapture on change

Idle state: schedule only probes that are incomplete, stale (returned on screen), content-dirty, environment-dirty, or past a long safety period.
Content-dirty: per-probe change detection from the instance store's changed regions (gVKChangedSpheres / overflow, instance versions) intersecting the probe's influence volume; separate handling for dynamic contents (avatars / movers) for dynamic probes (e.g. lower-rate refresh only while dynamic contents are present and moving).
Environment: graded (small drift -> slow trickle refresh; big change -> reset).
Realtime probe: skip faces / frames when its view contents and environment are unchanged.
Mirror/hero probe: skip when its view is unchanged (camera/mirror static, no changes in view).
Live settings to A/B; log captures per second, idle frames, reasons; GPU ms of pr_* passes.

Reflection probes are GPU-scheduled (#478) with off-screen skip (#517) and an environment-change reset, but the scheduler has no idle state: one probe face is captured every frame, forever, by age order, whether or not anything changed (+ filter / mip / BC6H encode after each capture). The realtime probe (detail 2/3) captures all 6 faces every frame with no change test, and the mirror captures every frame unless fully occluded. ## Today (clean_probe_gpu.comp, setProbes in llcleanrenderervk.cpp) - "Dirty" = probe origin moved > 1 m or radius changed > 15% -> only a +4 priority boost, not a gate. - Per-cell content hash re-places probes when cell bounds change; it does not force a recapture. - Environment change > 0.05 on the atmos lanes ages every capture (full nearest-first recapture); day-cycle drift repeats it. ## Goal: recapture on change - Idle state: schedule only probes that are incomplete, stale (returned on screen), content-dirty, environment-dirty, or past a long safety period. - Content-dirty: per-probe change detection from the instance store's changed regions (`gVKChangedSpheres` / overflow, instance versions) intersecting the probe's influence volume; separate handling for dynamic contents (avatars / movers) for dynamic probes (e.g. lower-rate refresh only while dynamic contents are present and moving). - Environment: graded (small drift -> slow trickle refresh; big change -> reset). - Realtime probe: skip faces / frames when its view contents and environment are unchanged. - Mirror/hero probe: skip when its view is unchanged (camera/mirror static, no changes in view). - Live settings to A/B; log captures per second, idle frames, reasons; GPU ms of pr_* passes.

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2026-10-15 01:09:38 +00:00

sky_line added this to the Slipstream project

2026-10-15 01:09:38 +00:00

sky_line referenced this issue

2026-10-15 03:01:53 +00:00

Intermittent white / pink / noisy flashes for a few frames (probe-like corruption) #777