You don't need one big fix. Dozens of small ones add up:

• ✅ Disable shadows on small objects

• ✅ Use Cull Distance Volumes for far objects

• ✅ Set Max Draw Distance on decorations

• ✅ Reduce texture resolution on distant objects

• ✅ Disable Tick on idle actors

• ✅ Use simple collision over complex

Each saves 0.1-0.5ms. Stack 20 of them = 5-10ms saved. That's the difference between 40 FPS and 60 FPS.

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Bad collision = objects falling through floors, triggers not firing, projectiles passing through targets.

Basics:

• Use Collision Presets (BlockAll, OverlapAll) before custom ones

• Enable Generate Overlap Events on BOTH actors for overlaps

• Use simple collision (boxes/capsules) over complex mesh collision

Debug: Type show collision in console to visualize all collision shapes.

When in doubt, keep it simple. A box collider that works beats a complex mesh collision that doesn't.

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Play In Editor is more than a play button. Use it fully:

• Alt+P: Quick play

• Shift+F1: Release mouse cursor while playing

• Eject: Detach and fly around while game runs

• Test multiplayer locally with Multiple Players setting

Debugging in PIE: Open Blueprints during play to watch execution in real time. Use World Outliner to inspect live properties. Type show collision in console.

PIE is a diagnostic tool. Use it like one.

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Every time you edit a Material, Unreal recompiles shaders — 30+ seconds on complex materials. Do that 50 times a day and you lose half an hour.

The fix: Material Instances.

1. Create a Master Material with exposed parameters

2. Right-click → Create Material Instance

3. Tweak parameters instantly — zero recompilation

One Master Material + many instances = fast iteration, clean project, and happy developers.

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Your game looks amazing on Ultra. Most players won't have your setup.

Always test on LOW:

• Visual bugs often only appear at lower quality

• UI might not scale properly at different resolutions

• Effects that look great on Ultra might look broken on Low

How: Drop Scalability Settings to Low, test at 1080p and 720p, use stat fps to monitor. If possible, test on an actual low-end machine.

The game that runs well on a potato wins more players.

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UE uses Garbage Collection (GC) to auto-clean unreferenced objects. Understanding it prevents crashes and memory leaks.

Key rules:

• In C++, always use UPROPERTY() for UObject pointers so GC tracks them

• Don't spawn/destroy hundreds of actors per second — use Object Pooling

• Call Destroy() on actors you're done with

• GC runs periodically and can cause hitches with thousands of objects

You don't need to master GC on day one, but knowing it exists prevents a whole category of bugs.

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Large worlds can't load everything at once. Level Streaming loads/unloads sub-levels as the player moves.

Setup:

1. Break your world into sub-levels (Window → Levels)

2. Use Level Streaming Volumes to trigger loading when players enter areas

3. Use Blueprint streaming for more control

Tips: Keep sub-levels focused, use transition zones (hallways, elevators) to hide loading, test with stat levels.

This is how small teams build big worlds.

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A game that crashes is worse than a game with bad graphics.

Stability checklist:

• Check for null/valid references before accessing them

• Use IsValid nodes religiously in Blueprints

• Handle edge cases (player dies mid-animation, reference destroyed, etc.)

• Watch the Output Log — warnings today = crashes tomorrow

Golden rule: If your game runs 30 minutes without a crash, your foundation is solid. If it crashes every 10 minutes, stop adding features and fix it.

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Premature optimization is the root of all evil — especially in game dev.

If you spend month one obsessing over draw calls and memory pooling before your game is fun, you're solving the wrong problem.

The right order:

1. Make it work

2. Make it fun

3. Make it fast

Use stat unit and GPU Visualizer to find ACTUAL bottlenecks. Don't guess — measure. Optimize problems, not assumptions.

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Use Blueprints for: Rapid prototyping, UI logic, simple mechanics, level scripting, designer-facing tweaks.

Use C++ for: Core systems (inventory, save/load, networking), performance-critical code, base classes, engine features not in Blueprints.

The pro approach: Build base classes in C++, extend with Blueprints. Best of both worlds.

But if you're just starting out? Blueprints first. Learn the engine, then add C++ when you hit their limits. Don't let C++ intimidate you into not starting.

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