I’ve been doing a deep dive into Liquid Glass behavior across iOS 26 releases and noticed what appears to be a significant behavior change between ~26.2 and 26.3/26.4. In earlier iOS 26 builds, toolbar/navigation bar glass appeared to adapt to the content behind it. In tinted mode, the glass would become frostier/lighter/darker depending on the backdrop. As of 26.3/26.4, toolbar glass behavior now appears tied to overall device appearance (light/dark) rather than the underlying content. This now closely matches the behavior of sheets (which have always ignored the background, and have been tinted light/dark based on the device appearance). However, the bigger issue: There does not appear to be any public API to make custom Liquid Glass controls participate in the same rendering/compositing behavior as true toolbar/navigation items. For example: .glassEffect() custom floating ornaments vertical stacks of controls over a map Do not visually behave the same way as: navigation bar buttons / toolbar items the sheet Even when using the same materials/effects. So currently there seems to be no way to create floating controls that visually harmonize with system toolbar glass behavior. Example use case: map-heavy UI vertical floating tool stack on the trailing edge wanting the controls to match toolbar. Questions: Was the toolbar adaptation behavior intentionally changed in 26.3/26.4? Is there any public API planned for custom Liquid Glass controls to participate in the same adaptation/compositing pipeline as toolbar/nav items? Is the expectation that developers should treat: toolbar/nav glass custom glass overlays as intentionally different visual systems? Would love clarification here because there's now a gap between system-owned glass and developer-created glass.