Guide for fullstack devs to build immersive web visuals with Canvas and WebGL: use Canvas for dynamic 2D charts, icons, and smooth animations; tap WebGL/GPU (via Three.js/Babylon.js) for interactive 3D, simulations, and VR/AR. Covers needed skills (JS/DOM, performance, linear algebra, shaders), best practices (optimize, accessibility, cross-browser testing), and a use case: real-time financial dashboard blending Canvas graphs with WebGL 3D.