UE 5.8 primary sources

Checked against Epic's Unreal Engine 5.8 documentation on 2026-07-19.

Navigation

• Navigation System
• Basic Navigation
• Navigation Mesh Settings
• Navigation Mesh Resolutions
• Modifying the Navigation Mesh
• Optimizing NavMesh Generation
• Navigation Invokers
• World Partitioned Navigation Mesh

Decisions and queries

• Behavior Tree Overview
• Behavior Tree User Guide
• Behavior Tree Decorators
• Behavior Tree Services
• StateTree Overview
• StateTree Debugger
• AI Perception
• Environment Query System
• EQS Testing Pawn

Interaction, crowds, and diagnosis

• Smart Objects Overview
• Avoidance with the Navigation System
• Crowd Manager Settings
• AI Debugging
• Gameplay Debugger

Maturity notes

• Core Recast NavMesh, Behavior Trees, StateTree, AI Perception, Smart Objects, and avoidance workflows have current 5.8 documentation.
• World Partitioned Navigation Mesh is explicitly Experimental.
• The current EQS Testing Pawn guide still refers to the experimental nature of EQS; keep EQS bounded and validated.
• Do not infer that all AI systems replicate or run on clients. Authoritative gameplay AI remains a project/network architecture decision.

Prefer the 5.8 page, installed engine source, console help, and working sample behavior over remembered earlier-version defaults.