Krzysiek Justyński

Technical Director at Fool's Theory. Working on The Witcher 1 remake. Recently released The Thaumaturge.
Awarded with #BAFTA for #EthanCarter.

[Krzysiek Justyński @MothDoctor]

There's a new pre-compiled release of the Flow Graph plugin for UE5! It's the first release for UE 5.7.

As usual, this is a community-driven release. You will find a lot of improvements introduced by teams using Flow in production.
Big kudos to Riot Games! <3

[Krzysiek Justyński @MothDoctor]

A compact summary on how useful will be these new tools and DX12 updates.

Especially worth to read if rendering isn't your specialization and you couldn't review new tools on your own.

[Adam Sawicki @Reg__]

DirectX 12 News from GDC 2026 - My Comments
https://t.co/KNY9R7LFkI

[Krzysiek Justyński @MothDoctor]

New plugin added to the Unreal main branch. Enables one of the productive ways of working with AI-assisted coding.

"Epic Code Assistant integration for Unreal Editor - enables AI-assisted development through MCP protocol."
https://t.co/UMDTvwjkSo

[Krzysiek Justyński @MothDoctor]

Here's the link to the Release Notes. You'll also find links to download the pre-compiled plugin.
https://t.co/NCpqJCH0Vp

Documentation has been moved to GitHub Pages. Now everyone can improve docs by submitting a pull request!

[Krzysiek Justyński @MothDoctor]

There's a new pre-compiled release of the Flow Graph plugin for UE5! It's the first release for UE 5.7.

As usual, this is a community-driven release. You will find a lot of improvements introduced by teams using Flow in production.
Big kudos to Riot Games! <3

[World of Statistics @stats_feed]

🏴󠁧󠁢󠁥󠁮󠁧󠁿 ENGLISH: Eat, eats, ate, eaten, eating

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[Bartek Moniewski @BartekMoniewski]

I bought cheap projector. Yay shaders!

[John Carmack @ID_AA_Carmack]

I can’t believe I only just now found out about this four years late while trawling through settings, but windows terminal has (literally!) “Quake Mode”, where win+backtick/tilde opens/closes a terminal at the top of your screen.

[Unreal Engine @UnrealEngine]

Hitches can occur for many reasons when loading and unloading map content🗺️

For this #TuesdayTips, jump into our guide to recognizing common level streaming hitches in your Unreal Insights captures and tips and links to resources to address them: https://t.co/zIS4NWnkIx

[Wojtek Sterna @wojtsterna]

When writing shaders in HLSL, be it in Unreal Engine 5, Unity, or any other engine for that matter, it is useful to remember about two intrinsic functions: 𝗿𝗰𝗽 and 𝗿𝘀𝗾𝗿𝘁.

Function 𝗿𝗰𝗽(𝘅), short for "reciprocal", simply calculates a reciprocal, that is the expression: 𝟭 / 𝘅.
Calling rcp in your shaders will generally be faster than calculating 1/x directly. So if you do a lot of divisions this might make a performance difference.

A sister function to rcp is 𝗿𝘀𝗾𝗿𝘁(𝘅), short of "reciprocal square root". It calculates exactly that - the reciprocal of the square root: 𝟭 / 𝘀𝗾𝗿𝘁(𝘅).
Same logic applies here as with rcp, that is calling rsqrt will in general be more performant than calculating 1/sqrt(x).

These two functions in general will result in faster code although this can happen at the expense of precision, so when using them always profile and examine the outputs closely.

Now have a look at the example in the attached image. It shows two ways of normalizing a vector in a UE5 material. One is via the standard 𝗡𝗼𝗿𝗺𝗮𝗹𝗶𝘇𝗲 function, which under the hood calls the standard HLSL full-fledged 𝗻𝗼𝗿𝗺𝗮𝗹𝗶𝘇𝗲 function.
Then, below that, is an alternative which normalizes a vector by:
- calculating the squared length of a vector
- multiplying the vector by 𝟭 / 𝘀𝗾𝗿𝘁(𝘀𝗾𝘂𝗮𝗿𝗲𝗱 𝗹𝗲𝗻𝗴𝘁𝗵)
Why this works?
Because the expression 𝟭 / 𝘀𝗾𝗿𝘁(𝘀𝗾𝘂𝗮𝗿𝗲𝗱 𝗹𝗲𝗻𝗴𝘁𝗵) is equal to 𝟭 / 𝗹𝗲𝗻𝗴𝘁𝗵, and when we multiply the vector by the inverse of its length we are normalizing it.

To sum up: if precision is important for your case, use standard normalization (𝗻𝗼𝗿𝗺𝗮𝗹𝗶𝘇𝗲 function in HLSL).
If precision can be sacrificed a bit then use 𝗿𝘀𝗾𝗿𝘁.
Always profile and inspect the outputs carefully.

.

[Cobra Code @CobraCodeDev]

I just discovered that you can just run a ForEach loop over a Map in Blueprints...

I used to always get the array of keys, loop over that and then find the value in the map🤦

[Dmitry Karpukhin @skx_doom]

What a fantastic presentation.
Niagara is absolutely one of the things why I love UE - it can be simple and incredibly advanced at the same time.
https://t.co/Z3zQkyoz7d

[Ari Arnbjörnsson @flassari]

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

[Caleb Longmire @clongmire42]

If you want to see me fumble around and try to explain our updates to the Game Anim Sample in 5.7 (along with my very talented colleagues who did NOT fumble around), be sure to check this out!

Some live mover demos begin at 1:42:00 for those curious!

https://t.co/5uAtls9w81

[Ari Arnbjörnsson @flassari]

We attempted to cram over 100 #uetips into a single presentation at Unreal Fest Stockholm. Did we succeed? Find our right here 👇
https://t.co/LLOtLxmRSW

[3DCenter.org @3DCenter_org]

Percentage of Steam users by GPU performance
https://t.co/ubSaDSgQ98

[Sebastian Aaltonen @SebAaltonen]

I have to disagree with Joe. Real-world rendering is nowadays clustered GPU-driven rendering. When we (Ubisoft) implemented GPU-driven rendering in 2015, we noticed that freeing artists from the draw call bottleneck, made the triangles the next bottleneck. Clustering algorithm prefers area local triangles. Thin long triangles make the cluster's bounding box bigger, which means that it has worse viewport/occlusion culling behavior.

Thin triangles are even worse for ray-tracing. Nvidia is specifically saying that artists should fan like geometry in their blog post:
https://t.co/R7FJvK5kow

[Aquanox @aquanoxtv]

Subsystem Browser Plugin v1.5
- Context menu Quick Actions
- Filtering subsystems with Ignore List
- Extended world types to view

And more changes on GitHub & Fab

https://t.co/sfKqlVQFxm

[passivestar @passivestar_]

The new godot UI theme has been merged and is on its way to be the new default!

I consider godot to be one of the most important software projects of our time and it's a huge privilege to be able to contribute to it. Happy to see it grow ❤️

[80 LEVEL @80Level]

Ihor Fridman is back to tell us about TeraLand, a new landscaping toolset for Unreal Engine 5.

The tool enables high-quality displacement without FPS loss, integrates seamlessly into existing pipelines, and requires no custom engine build or plug-ins: https://t.co/bkbUS3UOL6