Weatherloom · Sky Sandbox
Original simulation: Niels Daemen, 2D Weather Sandbox
https://github.com/niels747/2D-Weather-Sandbox/tree/0fe98cf10bc844a41e3c5cdb91b897dfe2080e5f
GPL-3.0-or-later; see LICENSE.txt. Modified November 4, 2026.
Changes: flat local assets and shader map; offline default atmosphere; reduced resolution/iterations/lightning texture sizes; compact controls and new introduction; omitted online sounding, file import/export, recorded audio and external navigation.
Unminified modified simulation and shader sources are served as app.js and shader-sources.js at this same site. No separate build is required.
Bundled libraries: dat.GUI (MIT), Chart.js (MIT), chartjs-adapter-date-fns/date-fns (MIT); upstream notices retained in library files.
Natural-sky offscreen render is capped at 800 by 600 pixels and smoothly upscaled; the simulation grid and pointer coordinates are independent. Default grid 200 by 300. Removed upstream leave-without-saving prompt because this edition has no file saving.
Default simulation advances six iterations per rendered frame (upstream ten); this lets sunlight propagate across the atmosphere promptly.