The combination test for one block: one partner from every other slot, then swapped with a sibling.

# lookbook cost GPU milliseconds of the style passes for each reference look (and optionally every block alone) at a chosen size, high and low quality, measured over the Lookbook's pan. ``` zero lookbook cost 1920 1080 zero lookbook cost 1920 1080 true ```

Play the Lookbook path over the current style stack and return the stability numbers.

# lookbook report Writes a whole Lookbook report for the engine it runs on: the Cookbook stack's stability numbers over the full path, and the GPU milliseconds of every reference look at 1920 x 1080, high and low quality. The report lands in `/zero/source/tmp/lookbook/report_<platform>.md` and `.json`, so a desktop run and a web run sit side by side. ``` zero lookbook report # the reference looks zero lookbook report true # also every block alone ```

Play the Lookbook path over the current style stack and save the same frames as PNGs.

# Lookbook (module) Plays the Lookbook's one camera path over whatever style stack the scene holds and measures how the look holds up in motion: `run` saves the same frames for any stack, `compare` does it for two stacks side by side, `measure` returns the numbers (difference warped along motion with newly revealed pixels left out, fine detail stuck to the screen during the pan, mark size across the 10x zoom, ms per pass at each quality tier, and the unstyled frame for reference) and `combos` runs the combination test for one block. Reach it with `require("~lookbookKit.Lookbook")` once the Lookbook scene is loaded.