We’ve Got Your Back: Engineering Optimization Ease
summary
Unreal Engine gains concrete optimizations: introducing the RHI thread (4.22) decouples RHI command lists from the Render Thread, yielding ~5% render-thread wins and enabling parallel command generation and DX11 submission; Intel’s ISPC powers Chaos, light baking and a fast texture compressor (bakes ~2.5x faster, compressor up to ~115x on Intel silicon); CPU particle paths get ~4x throughput; Variable Rate Shading nets ~1.2–1.4x GPU speedups; CMAA matches SMAA-like quality at FXAA cost; many features come as patches or GitHub branches.
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chapters (24)
- 0:00Intro
- 2:13Why do we care?
- 3:24A Journey
- 4:52Core Optimisation Question Stat Unit
- 5:57Render Thread: Batching/Instancing
- 7:26DirectX12 Optimizations
- 8:42Use an RHI Thread
- 9:38UE4's Threading Model: Game - Rendering Thread
- 10:30UE4's Threading Model: Rendering
- 11:32UE4's Threading Model: RHI Command List
- 13:34UE4's Threading Model: Game - Rendering - RHI Thread
- 14:22UE4's Threading Model: Parallel Frontend
- 16:10Chaos Physics
- 18:14Intel SPMD Program Compiler (ISPC) Integration
- 21:31Cascade CPU Particles
- 22:43Tools To Guide You
- 26:58ASTC Quality Comparison
- 28:23MOC Binned rendering
- 28:44Masked Occlusion Culling
- 30:14Problem: GPU cost varies over time
- 30:46Dynamic Resolution
- 34:26Variable Rate Shading
- 37:34Problem: Anti-Aliasing Performance v. Quality
- 38:40Common Themes
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