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This is the written Companion Guide to āOptimizing GPU Performance for āFar Far Westā. We go through the project in Unreal Engine 5.7 and explore opportunities for improving the GPU performance, especially for lower spec PCs.
The only sane way to optimize your game is by adding sensible profiling metrics in your (C++) game code. Unreal Engine comes packed with several good profiling tools and the Stats System (controlled by Stat Commands) along with Unreal Insights is what I will be covering in this article. It allows us to measure pieces of our game in different ways. I will demonstrate how you can use these metrics to your advantage, the macros are slightly different for the Stats System vs. ...
Installing and configuring JetBrains Rider for Unreal Engine C++ programming requires a very specific set of components. This guide will help you make this setup process go smoothly.
The Unreal Engine 5 refresh of the Professional Game Development in C++ and Unreal Engine course has entered early access. Completely re-recording the entire course and improving every aspect of the code, best practices and curriculum.
The release of Unreal Engine 5.7 includes many performance improvements and new optimization opportunities. They are mostly scattered throughout the release notes and can be vague and lacking context. This article highlights the most interesting improvements to the 5.7 release and provides annotations and clarifications to what certain optimizations or changes mean for you as a developer.
The release of Unreal Engine 5.6 brings a lot of incredible performance improvements to the engine. In this alternative release notes I have filtered the list down to the most interesting optimizations and performance related changes. Where appropriate I have added my own notes, to explain more clearly or give context as these notes can sometimes be rather vague or short.
Sometimes you only need a simple ātweenā style animation in C++ to interpolate values or animate certain gameplay elements using Curves and Easing Functions.
The following Highlights are taken from the Unreal Engine 5.5 Release Notes and focus primarily on real-time game performance on PC and consoles. My personal highlights have some commentary on them and at the bottom youāll find a raw list of changes that I found notable. There were so many changes that even at the bottom I choose not to include everything, especially if the release notes were vague on their benefit or actual improvement.
In recent years DirectX 12 games have gotten a bad rep for shader stutters. The most common issue we see discussed at launch is due to a lack of pre-compiling Pipeline State Objects. These PSOs (required by the GPU) need to be compiled on the CPU if not already cached on the local machine and will cause hitches as they may cost anywhere from a few milliseconds to several hundreds of milliseconds to compile before we may continue execution.
The complete reference guide to C++ for Unreal Engine game development. Covering all the essential programming concepts you need to code effectively in Unreal Engine C++. It includes all the commonly used concepts such as pointers, references, interfaces, macros, delegates, modules and moreā¦ Use it alongside other learning resources to learn more about a specific C++ programming concept.
For the JetBrains GameDev Day, I was invited to give a talk about Unreal Engine. I decided to create one for game optimization in Unreal Engine. Itās a topic Iāve been spending a lot of time with recently and wanted to share some tips and tricks. The slot of 45 minutes had only room for so muchā¦so expect more performance-oriented blog posts from me soon!
There is a better way to store and modify your project wide settings than using Blueprints or hard-coded C++. Learn how to use the Developer Settings class.
You may or may not be familiar with GameplayTags in Unreal Engine. Itās heavily used in Unrealās Gameplay Ability System, but can be used stand-alone in your game framework. In this article, I will introduce GameplayTags and how they can be used in your game, even if you choose not to use GAS.
For your game, you will eventually need to write some kind of save system. To store player information, unlocks, achievements, etc. In some cases, you will need to save the world state such as looted chests, unlocked doors, dropped player items, etc.
For my upcoming game WARPSQUAD, I was curious how easy it is to fetch data from a web service to be displayed in-game. The initial use case is a simple Message of the Day (MOTD) to be displayed in the main menu. Allowing for easy communication with players during playtests or (service) issues. You could use such web interfacing for posting in-game feedback too or whatever data you want to keep outside of the game executable to update on the fly.
Last year Nvidia announced DLSS 2.0 with the ability to open this new anti-aliasing solution for all games. The game-specific deep learning is no longer required as it was with prior iterations. For an indie dev that is especially exciting as the chance of getting onto Nvidiaās SuperComputer was pretty slim. Itās now easier than ever to add DLSS support to your Unreal Engine title!
What is Asset Manager?
Editing Arrays containing Structs in Unreal Engine has some bad UX. Especially for arrays with many entries as each element provides no context to its contents until you expand each element in the UI to inspect the contents. There is a way to make this look better using the TitleProperty meta-specifier! This trick is only available to arrays created in C++ that are exposed to be viewed in the Unreal Editor.
Unreal Engine can auto-detect āoptimalā (graphical) settings per player based on a quick CPU and GPU benchmark. The functions are available in Blueprint to hook up into your gameās options menu.
You can continue to move/rotate your camera while game logic is PAUSED in Unreal Engine. Unfortunately, itās a little obscure to set up so here is a quick overview with C++.
Unreal Engine Project Settings allow a major reduction (up to 50%) of shader permutations affecting shader compile times, package size, and load times. You can find the options under the Engine > Rendering > Shader Permutation Reduction Category. Which settings you can disable will depend on your projectās rendering requirements.
Rotating (ambient) meshes in your world adds a dynamic element, but doing this on the CPU and having to pass it to the GPU each frame is a relatively slow operation. Without realizing you may be updating your collision every tick too, causing overlap updates and hurting performance even more.
Since the last time I wrote about Utility AI for Unreal Engine 4, it has been stream-lined and so has the Action System itās built on. The Action System is quite similar to Unrealās Gameplay Ability System for those familiar. Towards the end Iāll tease a few other AI related concepts Iāve been working on. Here is part one in case you missed it.
Some time ago I saw a neat solution by Cory Spooner on outlining meshes using particle sprites. The concept has been done before - but itās interesting enough to cover it regardless for Unreal Engine specifically. We render the outline on a translucent cube or sphere that is tightly fitted around the desired mesh. We apply the outline material to this cube instead of a post-process chain. This letās us affect only small portions of the screen rather then pay the full-scree...
Unreal Engine comes with several AI features built-in (Behavior Trees, Blackboards, Navigation Mesh and Environment Query System) but hasnāt seen many improvements in this area since the launch of 4.0 several years ago. With mixed results in our projects using Behavior Trees we decided to look at alternatives.Ā Oz pointed me to Utility AI as a system for setting up AI behaviors,Ā I have since been fascinated by the simplicity of the concept to replace Behavior Trees in our p...
The Gameplay Framework of Unreal Engine provides a powerful set of classes to build your game. Your game can be a shooter, farm simulator, a deep RPG, it doesnāt matter. The framework is very flexible and does some heavy lifting and sets some standards. It has a pretty deep integration with the engine so my immediate advice is to stick to these classes instead of trying to āroll your ownā game framework as you might with engines like Unity. Understanding this framework is ...
In this post I will discuss depth (or distance) fog and the things I did to improve on the original basic effect while keeping this simple and light-weight. Itās not a step-by-step tutorial, but explains the core concepts behind the effect including a download link at the end.
Today Iād like to quickly show how you can add UI for things like health bars, nameplates, interaction prompts and more in Unreal Engine. Itās quite simple to do, and I hear a lot of questions about this, so today Iāll share you some tricks to make this even easier. The sample code is done in C++, but keep reading as I show you a quick and easy Blueprint-only trick too! The following guide explains the concept of how to be able to fetch the information you desire for your ...
Unreal Engine posted an excellent MasterClass talk by Jerome Platteaux on Lighting duringĀ Unreal Dev Day Montreal 2017.Ā The video is worth a full watch, it contains tons of interesting practical tips and explains many of the Lightmass features of Unreal Engine 4. I am writing this post to create a personal reference of all the useful data contained in this video without having to scroll through the video every time I am looking for some information. I mostly focused on the...
As I have been preparing some Unreal Engine C++ tutorials, I wanted to use the Built-in C++ FPS Template that ships with the engine as a base project and found it has VR and Touch-input code in the character class which donāt serve any purpose unless you are interested in VR and/or mobile. Since I needed a super simple C++ template to not scare people away from learning this language, I decided to create a simplified version with only the essentials for non-VR projects and...
Ever since I first wrote about creating mesh outlines in Unreal Engine I have wondered if it was possible to render them as soft outlines instead of harsh binary lines. A good example of soft outlines can be found in Valveās games like Left 4 Dead or CS:GO.
Earlier this week I tweeted about hit-masking characters to show dynamic blood and wounds. Today Iād like to talk a little about the effect and how it came to be. Iāll talk a little bit about the technical details and some alternatives. The effect is a proof of concept to try and find a cheaper alternative to texture splatting using render targets. So letās get going!
This weekend I stumbled upon a reddit post about Dr. Facilierās interesting shadow in The Princess and the Frog and it inspired me to experiment with Forward shading in Unreal Engine 4 to re-create a similar effect in real-time shading. OP pointed out that The Shadow Manās shadow changes the wallpaper his shadow is cast on. A subtle but quite interesting effect!
In this post I will be covering the common keywords used with the UFUNCTION macro in Unreal Engine 4. Each of the keywords coveredĀ include a practical code sample and a look at how it compiles into Blueprint nodes.Ā I left out the networking specific keywords as they deserve a separate post on networking in Unreal Engine 4 and instead I focus on the different keywords used for exposing your C++ to Blueprint.
With some of the recent changes to Unreal Engine 4, rendering multi-color outlines is now possible! This is done through the use of Custom Stencil, a new buffer similar to Custom Depth - but allowing meshes to render as integer values. This provides us with a 1-255 range of indices that can be used to apply different outline colors to meshes and even combine multiple features such as the decal x-ray shown below by using a different stencil index.
We recently added a new locking feature to Switch for which we needed to have progress feedback. For this I built a circular progress bar inĀ UMG. Iām giving away the material to use in your own projects. The download link is at the bottom. If you wish to learn more about the effect, keep reading - otherwise you can simply scroll down and download the material outright and explore it on your own. Enjoy!
Find out how to use timers in Unreal Engine 5 C++ including delegates, passing parameters and FTimerHandles.
Unreal Engine leverages the power of Signed Distance Fields for Ambient Occlusion and more recently added Ray Traced Distance Field Soft Shadows. I will briefly discuss and demonstrate both effects as a result of some early research to consider using these techniques for our game. Since the core of Switchās design hinges on fully dynamic levels, we simply cannot bake down any lighting. As a result we have to look out for a better approach to create scene definition and ton...
Unreal Engine 4 introduced a new depth buffer along with its PBR rendering system. Itās called āCustom Depthā and can be used for effects like the selection outline that is built-in in the Editor, rendering of occluded meshes, or custom culling of transparency. I will discuss some of the basics of using this buffer in the material editor and explain some of the features I used it for in my own projects.
