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Ari Arnbjörnsson @flassari.bsky.social · 25/09/2026

The text version of "Profiling with Pirates" is up! Check it out if you really don't want to see @mattoztalay.bsky.social and me in pirate costumes singing a shanty. Or if you just prefer text/images over hour-long videos, like me 😄 #uetips dev.epicgames.com/community/le...

dev.epicgames.com

Profiling with Pirates: Performance Plundered from a Real Game | Tutorial

Ahoy, performance hunters! How does Epic Games’ Technical Developer Relations crew hunt down frametime treasures? Climb aboard as Ari and Matt crack op...

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Ari Arnbjörnsson @flassari.bsky.social · 21/09/2026

Have you been wanting to get into game performance optimization, but don't know where to even start? The UE Performance Optimization Learning Path now contains over twenty tutorials, most of them from Epic Games, sorted by skill level. dev.epicgames.com/community/le...

dev.epicgames.com

Unreal Performance Optimization Learning Path | Learning path

This learning path combines tutorials and articles dealing with game performance and optimization - from PSO hitches to input lag.

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Ari Arnbjörnsson @flassari.bsky.social · 03/09/2026

Smart Poly made a great summary of the Inside Unreal livestream @tomlooman.bsky.social and I did: www.youtube.com/watch?v=dSpI...

youtube.com

Epic Just Revealed the BEST Ways to Optimize UE5

YouTube video by Smart Poly

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Ari Arnbjörnsson @flassari.bsky.social · 03/09/2026

We just uploaded a great presentation about UI Performance at Unreal Fest Chicago by @codyjero.me, check it out! #uetips www.youtube.com/watch?v=VxX1...

youtube.com

UI Performance & Invalidation Debugging | Unreal Fest Chicago 2026

YouTube video by Unreal Engine

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Ari Arnbjörnsson @flassari.bsky.social · 22/08/2026

My second presentation at Unreal Fest Seoul had us myth-busting common UE "best practices". The audience got most of them correct, great job 💪 "Hi from Seoul!" 👋

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Ari Arnbjörnsson @flassari.bsky.social · 20/08/2026

First time in Korea! 🇰🇷 Super happy with a full room of local developers wanting to learn how to improve their frame pacing and input latency. "Hi from Seoul!" 👋

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Ari Arnbjörnsson @flassari.bsky.social · 12/08/2026

Tomorrow, @tomlooman.bsky.social and I will be looking at the optimization journey of Far Far West on the Inside Unreal livestream. Will Tom's efforts impress the Hitch Hunter? 👀 Tune in here: youtube.com/live/kJPqrvB...

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Ari Arnbjörnsson @flassari.bsky.social · 21/07/2026

"A Frame's Life", my presentation about frame pacing, input latency, and jitter in UE, is live right now! www.youtube.com/watch?v=dKSH...

youtube.com

A Frame’s Life: Frame Timing, Synchronization, and Latency in UE | Unreal Fest Chicago 2026

YouTube video by Unreal Engine

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Ari Arnbjörnsson @flassari.bsky.social · 21/07/2026

Had a great panel on "Optimizing Optimization" with Ken Noland, Simon Barrat, and Dan Wood at @developconference.com. "Hi from Brighton!" 👋

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Ari Arnbjörnsson @flassari.bsky.social · 20/07/2026

Had a great time in England teaching the Brits about frame pacing and input latency in Unreal. "Hi from Brighton!" 👋

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Ari Arnbjörnsson @flassari.bsky.social · 16/07/2026

Super happy with a full room of devs interested in improving frame pacing and input latency in their games at Unreal Fest 🙌 "Hi from Chicago!" 👋

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Reposted by Ari Arnbjörnsson

Matt Oztalay (He/Him) @mattoztalay.bsky.social · 14/07/2026

Avast mateys! Profiling with Pirates, @flassari.bsky.social and I's session from #UnrealFest Chicago is already live on YouTube! Thanks again to @limbicgames.bsky.social for letting us profiling your game and talk about it live on stage! www.youtube.com/watch?v=CYvL...

youtube.com

Profiling with Pirates: Performance Plundered from a Real Game | Unreal Fest Chicago 2026

YouTube video by Unreal Engine

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Ari Arnbjörnsson @flassari.bsky.social · 24/06/2026

I've found that a released game's technical performance often correlates with how many people on the team are solely or mostly focused on profiling and optimizing.

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Ari Arnbjörnsson @flassari.bsky.social · 20/06/2026

Polly the Profiling Parrot helped me and Captain @mattoztalay.bsky.social realize that the true treasures are well optimized games! Hi from Chicago! 👋🦜🏴‍☠️

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Reposted by Ari Arnbjörnsson

Matt Oztalay (He/Him) @mattoztalay.bsky.social · 11/06/2026

Arrrrrrii!! What have ye done?

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Ari Arnbjörnsson @flassari.bsky.social · 11/06/2026

Hey, Captain @mattoztalay.bsky.social! I just traded our pirate ship for this magical parrot that should be able to lead us to amazing riches! What a bargain! Apparently, we're supposed to find the treasure at something called "Unreal Fest Chicago" next week.

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Ari Arnbjörnsson @flassari.bsky.social · 20/03/2026

What's this? Info on Unreal's next-generation terrain solution? 👀 Full 3D, enabling overhangs and tunnels?! Multi-user non-destructive modifiers, and it can still import heightfields?! Both Nanite and trad LODs 🤯 dev.epicgames.com/community/le...

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Ari Arnbjörnsson @flassari.bsky.social · 10/03/2026

This week marks my five-year anniversary at Epic Games! 🎉 Thank you to my lovely coworkers and to all the UE devs out there who make my job such a blast! Keep making amazing games everyone! 🤘

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Reposted by Ari Arnbjörnsson

Joe Wintergreen @joewintergreen.com · 07/03/2026

When Unity started collapsing I made a quick "how do I get going in Unreal" website many folks found helpful. that website has now MOVED and is a DIFFERENT COLOUR. If you want Unreal demystification, tips and scoops, this is a place www.ughiguessiwanttomovefromunitytounreal.com

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Ari Arnbjörnsson @flassari.bsky.social · 02/03/2026

I keep seeing people using the old UE logo to advertise their game/product. We updated it quite a while ago (the U is rounder now.) You can just download the high-res logo from unrealengine.com/branding, don't get it from Google Images 😬

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Ari Arnbjörnsson @flassari.bsky.social · 18/02/2026

That's how you get zero stutters in your game. You're welcome, game industry. #uetips

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Ari Arnbjörnsson @flassari.bsky.social · 14/02/2026

"Clair Obscur was 95% Blueprints" I've been eagerly waiting for this talk to be uploaded, great job Tom and team 💪 youtu.be/t1CrbTx6O6w?...

youtu.be

The Technical Journey of Clair Obscur: Expedition 33 | Unreal Fest Stockholm 2025

YouTube video by Unreal Engine

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Reposted by Ari Arnbjörnsson

unreal🌱garden @unreal-garden.com · 14/02/2026

I gave a talk on Slate in Unreal Engine as part of JetBrains GameDev Day, and the individual video is now up! www.youtube.com/watch?v=1n3oIfI7nBM #UnrealEngine

youtube.com

Oops

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Ari Arnbjörnsson @flassari.bsky.social · 21/01/2026

Super early birds get the worms. The discount worms 🪱 200 worms! Or I mean, they get to not have those worms. Uhm... Anyway, cheap tickets! 😅 Super-early bird pricing at $200 off for Unreal Fest Chicago are now available: unrealengine.com/events/unreal-fest-chicago-2026

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Ari Arnbjörnsson @flassari.bsky.social · 20/01/2026

The deadline for submitting talks for Unreal Fest Chicago is this Thursday, Jan 22nd! ⏱️

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Ari Arnbjörnsson @flassari.bsky.social · 12/01/2026

Check out all the recent work that's been done to make async loading UObjects in the editor a reality. You can give it a try in 5.7: dev.epicgames.com/community/le...

dev.epicgames.com

Mastering Async Loading in Unreal Engine | Knowledge base

This tutorial explains how async loading works and how to best leverage it.

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Ari Arnbjörnsson @flassari.bsky.social · 02/01/2026

Conferences can be super busy; it can be hard to find the time to eat dinner. Fun fact: hors d'oeuvres can be a dinner if you just eat enough of them! 🤯 Pic related: me gobbling down finger food while the other person talks.

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Ari Arnbjörnsson @flassari.bsky.social · 16/12/2025

My coworker Zhi Kang Shao just published the Level Streaming Hitching Guide, a huge resource on the things you can do to prevent hitches during level streaming. Read it here: dev.epicgames.com/community/learning/tutorials/qpll/unreal-engine-level-streaming-hitching-guide

dev.epicgames.com

Level Streaming Hitching Guide | Tutorial

Guide to recognizing common level streaming hitches in your Unreal Insights captures and tips and links to resources to address them. Hitches refers to ...

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Ari Arnbjörnsson @flassari.bsky.social · 16/12/2025

Unreal Fest 2026 is coming to Chicago next June, and I want YOU to present there! Call for proposals is open until January 22nd, speakers get free hotel accommodation and conference tickets 🤘 Apply here: unrealengine.com/news/apply-to-present-at-unreal-fest-chicago-2026 I hope to see you there!

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Ari Arnbjörnsson @flassari.bsky.social · 15/12/2025

"Mafia: The Old Country: Using MetaHuman in a AAA Character Pipeline" is a fantastic talk on Hangar 13's use of MetaHuman for their amazing-looking characters! 🤩 Watch it here: youtube.com/watch?v=V8rL1r_1IcQ

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Reposted by Ari Arnbjörnsson

Matt Oztalay (He/Him) @mattoztalay.bsky.social · 11/12/2025

Ari and I both said a lot of words on stage at #UnrealFest Stockholm, and I think these are the most important. How to think about profiling, how to read the unicorn barf that is Unreal Insights, and tips for looking at GPU captures.

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Ari Arnbjörnsson @flassari.bsky.social · 11/12/2025

How do we profile games at Epic Games? Check out this presentation where @mattoztalay.bsky.social and I examine perf captures from Arctic Hazard's "NORSE: Oath of Blood" and show you how to use Unreal Insights and PIX. www.youtube.com/watch?v=C-Aj...

youtube.com

Profiling with Purpose: Performance Lessons from a Real Unreal Project | Unreal Fest Stockholm 2025

YouTube video by Unreal Engine

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Reposted by Ari Arnbjörnsson

Game Makers Iceland @gamemakersiceland.bsky.social · 05/12/2025

Hæ from Reykjavík! Huge thanks to @flassari.bsky.social for being part of the very first Reykjavík Game Summit, and for capturing this great moment along the way! 📸

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Ari Arnbjörnsson @flassari.bsky.social · 04/12/2025

When an Unreal 5.3+ game runs, it will immediately kick off precompilation of global shaders. You should wait for that to complete before starting the game, otherwise you'll likely get hitches. You do that with the NumPrecompilingPSOsRemaining node. #uetips

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Ari Arnbjörnsson @flassari.bsky.social · 03/12/2025

I got to be a part of history! Super grateful to be able to participate on stage at Reykjavík Game Summit's inaugural conference 🤩 "Hi from Reykjavík!" 👋

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Ari Arnbjörnsson @flassari.bsky.social · 03/12/2025

I've been waiting on this one! See how to use our new and immensely powerful GPU profiler in Unreal Engine 5.6+, and how it helps you debug GPU crashes! #uetips www.youtube.com/watch?v=vnbA...

youtube.com

New GPU Profiler and RHI Submission Pipeline | Unreal Fest Stockholm 2025

YouTube video by Unreal Engine

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Robin-Yann Storm @rystorm.com · 30/11/2025

I was not able to make it to Unreal Fest Stockholm, but thanks to @flassari.bsky.social I still ended up on stage! You can find me at 1:50:46 in the video, when I show the Unreal asset browser feature to rotate thumbnails of 3D assets.

Me on the projector on stage at Unreal Fest Stockholm, in a video, talking about the thumbnail previewer in the Unreal asset browser

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Ari Arnbjörnsson @flassari.bsky.social · 30/11/2025

We attempted to cram over 100 #uetips into a single presentation at Unreal Fest Stockholm. Did we succeed? Find our right here 👇 www.youtube.com/watch?v=4w0P...

youtube.com

101 Unreal Engine Tips & Tricks: The Reckoning | Unreal Fest Stockholm 2025

YouTube video by Unreal Engine

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Ari Arnbjörnsson @flassari.bsky.social · 29/11/2025

We managed to fill the room at CCP Games for the Reykjavík Unreal Engine Evening, no wonder with those banger presentations 🤩 "Hi from Reykjavík!" 👋

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Ari Arnbjörnsson @flassari.bsky.social · 14/11/2025

Did that Super Mario Galaxy movie trailer get your nostalgia running? Feel like getting it out of your system by creating something? Why not start with the Custom Gravity tutorial, it will make for a great base for tiny planet hopping! 🌍🏃‍♂️‍➡️🌏 dev.epicgames.com/community/le...

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Ari Arnbjörnsson @flassari.bsky.social · 13/11/2025

UE 5.7 is out, featuring our new Megaplants plugin: procedural instanced nanite skeletal meshes that voxelize in the distance 👀 @williamfaucher.bsky.social just released a great "getting-started" tutorial on it: www.youtube.com/watch?v=3f7m...

youtube.com

Unreal Engine 5.7 MEGAPLANTS Crash Course #ad

YouTube video by William Faucher

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Ari Arnbjörnsson @flassari.bsky.social · 11/11/2025

We just released "Unreal Materials: New Features & Productivity Enhancements", where my coworker @shedoesartstuff.bsky.social shows off a bunch of quality-of-life improvements to the Material Editor in UE in 5.6/5.7, alongside new and upcoming features. #uetips www.youtube.com/watch?v=KYmd...

youtube.com

Unreal Materials: New Features & Productivity Enhancements | Unreal Fest Stockholm 2025

YouTube video by Unreal Engine

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Ari Arnbjörnsson @flassari.bsky.social · 31/10/2025

We just published "The Road to 60 fps in The Witcher 4 UE5 Tech Demo", where you can see how we got 300+ moving characters and 100k+ fully modeled trees and scrubs running at 60fps on a base PS5. www.youtube.com/watch?v=ji0H...

youtube.com

The Road to 60 fps in The Witcher 4 Unreal Engine 5 Tech Demo | Unreal Fest Orlando 2025

YouTube video by Unreal Engine

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