Punchy frame_rate mult held over the first/last slice of a scene's denoise progress, easing to natural in the middle - same progress- from-sigma mechanism as pulse, shaped as a single edge ramp instead of repeated segments. Wired through build_enhancements (single-scene), the Scene Chain Sampler's per-scene wrapper dispatch, and both Studio and Editor temporal-style dropdowns. Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>