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Blueprint Inspector

Module: Tech · Category: QA · Tool ID: BlueprintInspector

Three-tab Blueprint analysis suite. Complexity scans Blueprints for node counts, nesting depth, tick usage, cast count, etc. Interfaces audits Blueprint Interface conformance — which Blueprints implement which interfaces, where conformance is incomplete. Event Timeline traces event execution order — useful for debugging “BeginPlay race condition” type issues.

Screenshot 01 — Hero shot — Inspector on Complexity tab with mixed-severity Blueprints listed, top entries sorted by node count.


  • Project-wide Blueprint complexity audit
  • Pre-shipping QA — finding Blueprint complexity hot spots
  • Interface conformance review — confirming Blueprints actually implement what they claim
  • Debugging event-ordering bugs
  • Don’t expect this to refactor Blueprints — surfaces issues; fixes happen in the Blueprint editor

  1. Open the EQLabs Hub and search for Blueprint Inspector (or browse to Tech → QA)
  2. Click the tool card
  3. Use the tab bar: Complexity / Interfaces / Event Timeline

Per-Blueprint metrics: total node count, nesting depth, tick usage, cast count, common anti-patterns.

Audit conformance:

  • Which Blueprints implement Blueprint Interfaces
  • Where implementations are incomplete (missing functions, signature mismatches)
  • Orphan interfaces (no implementers)

Trace event execution order — BeginPlay, BeginPlay (Actor), BeginPlay (Component), custom events. Useful for catching race conditions where two Blueprints depend on each other’s BeginPlay.


Persists via standard tool framework.


  • In-panel results per tab
  • Click-to-navigate — single-click pings, double-click opens BP editor

  • High node count is often legitimate — a complex character BP can have 500+ nodes. Use as signal, not absolute rule
  • Tick usage on every Blueprint is the common anti-pattern — finding which BPs tick when they don’t need to is high-value
  • Interface conformance gaps cause runtime cast failures — fix before shipping


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