nordisk/facett

Falsett GPU reference

flow_gpu.png was initially captured on 2026-10-04 in the actual Facett workspace on Apple M2 Pro / Metal, using egui 0.36.2 and wgpu 30.0.1. It is not a Loki or dwarf capture. The fixture uses the demo run's DAG, sci-fi theme, 900×600 points and one pixel per point. The test requires real Falsett callback frames.

Compare without changing the reference:

FACETT_TEST_GPU=integrated cargo test -p facett-brokkrview --features wgpu --test flow_gpu

The per-channel tolerance is 2. Only an intended, reviewed visual change should use UPDATE_SNAPSHOTS=1; other hardware comparisons remain separate validation.