perf(freshcut): the heaviest frame in the film at 0.8 render scale
FRESH CUT reads 35.7 ms of GPU and 19.6 drawn fps on the delivered frame with a
recorder attached, where the same part cost 8.1 ms before its cast shadows went
in — four times any other part here, and the one part whose cost the polish pass
made materially worse. The cost is fill, not geometry: 604 draws through a
g-buffer at the full raster plus the cascade the lawn needs.
P.resolutionScale = 0.8, which the director applies at the boundary and restores
at the next one. Measured at the same camera and the same part-local second:
frame span 40.7 -> 24.4 ms, drawn fps 19.6 -> 23.9, draws unchanged at 602.
resolutionScaleMode stays 'present', so the delivered frame is still 2560x1440,
and the grass, the shadows and the mark in the lawn are all still there.