On top of 2026.9.4-b1: your arrays in the scene, a lighter rotation, and the editor rebuild fixed.
Added: your arrays in the scene, with Helios-Forecast
With Helios-Forecast (2026.9.1 or later) providing the forecast, the card reads the lines you configured there and marks each one in the scene: a small spring-green tile at the line's own position (or on your home's roof, on the side it faces, when the line has no coordinates), turned to its azimuth and raised to its tilt, brightening as the sun comes square to it, with a hairline of dots to the sun while it is up. The single sun-to-production ray steps aside when tiles show. Nothing appears without the integration, no name or value is written next to a tile. Asked for by @caswal (#374). Needs the matching Helios-Forecast prerelease to show up (coming next).
Changed: the scene keeps its buildings and shadows between frames
The buildings-and-shadows layer is no longer rebuilt from one markup string on every camera move; its shapes stay alive and only what moved is rewritten. Same picture to the pixel (checked across five camera poses and three times of day against b1). Under a six-times CPU throttle a continuous rotation drops from about 76% to 65% of the main thread busy, and its worst frame from 50 ms to 27 ms.
Fixed: editing the card no longer boots it from nothing at every change
In the visual editor, Home Assistant destroys the card and creates a fresh one on every setting you change. Each fresh card used to start blank (no map, no buildings, empty chips and timeline) while it re-fetched and repainted everything, and every rebuild left the previous 32 MB basemap canvas waiting for the garbage collector, which a run of quick changes on a phone could turn into a WebView reload or a card stuck half-drawn. A leaving card now parks its painted map and hands over its data to the one that replaces it, and any map nobody claims within a minute has its canvas emptied at once. The mechanism behind #414: please retest there.
Still in this beta line: the moon (#408), the scene zoom, the "J - J+2" period, the per-battery sign guard (#422), the frozen-forecast fix, the non-admin fetch-loop fix, and the b0 performance pass. Full details in the CHANGELOG.
To test: in HACS, open Helios, click the three dots > Redownload, and pick 2026.9.4-b2 from the version dropdown.