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Dion Moult
99f409280a
HiZ from last frame encodes depth from last frame's viewpoint. When the camera moves, projecting a current-frame AABB through the stored VP answers 'was this occluded last frame?' rather than 'is it occluded now?' — a self-reinforcing feedback loop where objects culled in prior frames never appear in any depth buffer and stay permanently hidden at certain camera angles. Fix: require hiz_vp_ == current VP for the HiZ test to apply. HiZ still helps static views (kicks in one frame after camera stops) but no longer produces false occlusions during orbit. The correct fix for orbit coverage is a depth pre-pass feeding fresh HiZ — planned as part of Phase 3E GPU compute cull. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>