Liquid / Glass / Flat apply to Help, Discover, Facets (wiki), Conversations, Account, and Onboarding. Liquid DOM frosts the floating overlays (Settings & search popovers, Core / More menus, bottom tab bar) into glass over the content behind them.

Only visible under the Glass style.

Opacity of the 1px outline around incoming message bubbles (all four edges). 0 = fully transparent, 20 = baseline. Liquid/Glass only.

Renders the Logo overlay through Three.js with a real UnrealBloomPass instead of model-viewer's tone-mapped fake bloom. Off by default.

Scales the accent's saturation from 0 (gray) to 100 (vivid). Affects every blue surface — buttons, focus rings, the iMessage-style Me bubble.