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bflatasticandClaude Opus 5.5
8c4a3cbfe0
Cause: pipeline::Cx rendered with Backend::Auto, which picks the CPU or the GPU compositor for each top-level frame from measured frame times (render::AutoPick: warm-up on both sides, a re-probe every 48 frames). The two compositors differ slightly, so frames came out differently depending on which side the timings favoured in that run, and two GPU exports of the same frames differed. Fix: the job renders every frame on the project's renderer, as After Effects renders a job with one renderer: Backend::Gpu with Mercury GPU Acceleration (frames the GPU declines still render on the CPU, as they do in every GPU render), Backend::Cpu with Mercury Software Only. The viewer and previews keep Auto. Docs (architecture, parity, web) say so. Tests: render_settings::a_job_renders_on_one_compositor exports ten frames with a stand-in GPU compositor that keeps Auto history and draws solid green: with Mercury GPU Acceleration every frame is green and two runs are identical (with Auto the warm-up sent frames to the CPU: it fails), with Software Only the stand-in is never asked. The web worker GPU job test's comment no longer describes Auto. Diagnosis by @pat-the-wizard. Co-Authored-By: Claude Opus 5.5 <[email protected]>