Three.js Performance & Loading Patterns

Patterns drawn from studying modern Three.js/WebGPU production sites built by top-notch studios and developers, each solving a different piece of "make a heavy real-time scene feel instant and never stutter." This file distills the transferable patterns, organized by what problem they solve.

Don't treat any of this as an au-courant checklist to apply wholesale — each technique below traded something (code complexity, a stubbed physical behavior, a hard cutoff) for its win. Read the "cost" note on each one before copying it.

1. Loading & warmup — hide compile/decode cost behind the spinner