A tutorial on building a scroll-driven WebGL gallery in Three.js with depth-layered images, palette-driven backgrounds, and motion that responds to scroll velocity.

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A detailed tutorial on building a scroll-driven 3D WebGL gallery using Three.js. The gallery stacks images along the Z-axis, each with its own color palette that smoothly transitions the background as you scroll. Key techniques covered include: camera movement driven by smoothed scroll input with bounds clamping, a velocity signal derived from scroll speed that drives background brightness and plane motion, a GLSL fragment shader rendering soft color blobs with film grain, parallax and 'breath' micro-motion tied to mouse position and scroll speed, and a Catmull-Rom spline trail that winds through the scene. The project is structured with class-based separation of concerns using Vite and plain JavaScript.

Building a Scroll-Reactive 3D Gallery with Three.js, Velocity, and Mood-Based Backgrounds

<p>This is awesome! Thanks for sharing.</p>
