Drift through a glowing undersea cavern as your flashlight beam sweeps across drifting light-forms and rock. The camera glides automatically along a 9-point Catmull-Rom curve through the tunnel while 2,600 points rendered with a custom GLSL ShaderMaterial pulse and glow via additive blending, each with its own randomized phase and size. Seven jellyfish-like creatures built from sphere "bells" and cylinder tentacles bob and pulse independently and each carries its own point light, and the rock walls are assembled from instanced icosahedron boulders and cone stalactites/stalagmites scattered in rings around the path.