START HERE — Triage

Symptom-based router. Find your symptom, jump to the domain.

By symptom

• It's slow, but I don't know what's bound → Performance & Profiling — identify CPU vs GPU bound first
• GPU-bound → Rendering & Lighting, Optimisation (overdraw, Nanite/Lumen cost, draw calls)
• CPU-bound / game thread → Tools & Workflow (Blueprint/tick cost), Animation & Rigging, UI / UMG
• It stutters / hitches → Performance & Profiling (shader comp / PSO), Optimisation (texture streaming), World Building / Streaming (level streaming)
• Out of memory / crashing → Memory
• It looks wrong after scaling down → Scalability, Platform-Specific
• Slow to build / cook → Build & Cook
• "I lost a day to this" → Gotchas & War Stories

All domains

• Rendering & Lighting
• Performance & Profiling
• Optimisation
• VFX / Niagara
• UI / UMG
• World Building / Streaming
• Animation & Rigging
• Memory
• Scalability
• Platform-Specific
• Tools & Workflow
• Build & Cook
• Gotchas & War Stories