Three issues in sample_jets produced the reported "jet column + bright
white ring over the hole's pole" on the default scene (spin = 0,
jets_enabled = true):
1. Jets rendered at χ = 0. Relativistic jets are spin-powered
(Blandford-Znajek taps the ergosphere), which doesn't exist for a
non-rotating hole. jets_enabled was a free toggle decoupled from
spin, so the default scene showed polar columns with no physical
cause. Gate sample_jets on uniforms.spin >= 0.05.
2. Beaming saturates to white. With β=0.92 the approaching jet's
δ^3.5 reaches ~258×, blowing the blue base color past the bloom
threshold so High-level bloom (3-pyramid) collapses it to white.
Cap beaming at 8× — the approaching side is still visibly brighter,
and the base color (0.4, 0.7, 1.0) survives the HDR + bloom path.
3. dt-modulated accumulation painted ring structures. `* dt` weighted
the per-step contribution by the RK45 adaptive step size, which
varies across a 16× range (dt_min..dt_max) and between neighboring
pixels — the same class of bug the disk path already documented and
fixed in integrate_disk_segment (radial spokes). The jet has no
analytic slab to clip to, so use a fixed normalized weight (0.5);
brightness then depends only on geometry and beaming, never on dt.
Drops the now-unused dt parameter.
xfy
38d4bd00f2