How to architect a browser-based isometric game using Three.js

Developer Mendola.Tech has shared lessons from building Eidolon, an open-source isometric action game running in the browser using the Three.js WebGL library. The project highlights that browser games must treat the entire startup sequence — asset loading, input setup, and first frame — as part of the player experience, not just the gameplay loop. Key architectural advice includes separating game simulation logic from the Three.js scene graph, validating GLTF asset conventions early, and monitoring draw calls, texture memory, and garbage collection rather than relying on feel alone. The team also recommends implementing adaptive quality settings for resolution, shadows, and particle counts to handle the wide range of mobile and desktop hardware. Eidolon's source code is publicly available, and the overarching guidance is to keep the game's critical path lean enough that startup, rendering, and simulation can be understood as one connected system.