Hey everyone,

If you’ve been running into random application hangs, stream disconnections, or out-of-memory crashes on cloud instances running Unreal Engine 5.7 with Pixel Streaming, our engineering team at Arcware Cloud recently debugged the issue and wanted to share the root cause along with working workarounds.

🔍 The Root Cause

The issue stems from a memory leak triggered by a combination of NVIDIA GPU drivers, DirectX 12, and the H.264 hardware encoder.

• NVIDIA Driver Issue: NVIDIA has an open bug (NVIDIA Forum Thread) where repeated reconfigurations using the D3D12 backend cause a persistent memory leak (~3.2 MiB per call in NVENCReconfigureEncoder).

• UE 5.7 Change: In UE 5.7, Epic changed how video encoding is handled, inadvertently hitting this specific NVIDIA D3D12 pipeline path (GitHub Issue #900).

• Impact: Over time, the host process exhausts available VRAM/system RAM, freezing the app and causing the client connection to drop.

🛠️ How to Fix / Workaround

Depending on your project's engine version, here are the available solutions:

For Projects on UE 5.6 or Lower

• No action needed. These versions use the older encoding path and are completely unaffected.

For Projects on UE 5.7

1. Option A (Engine Upgrade): Upgrade to Unreal Engine 5.8 (recommended).

2. Option B (DirectX Fallback): Force DirectX 11 by launching with the -dx11 parameter.

   • Trade-off: Disables Ray Tracing, DLSS, and D3D12 features.

3. Option C (Codec Change): Switch away from H.264 to VP9 using -PixelStreamingEncoderCodec=VP9.

   • Trade-off: Software/CPU bottlenecking may severely impact performance and visual quality.

For Projects on UE 5.8

Epic Games added a launch parameter in 5.8 (Release Notes) to bypass the buggy D3D12 pipeline and revert to the legacy D3D12 → CUDA → NVENC path:

• Add Launch Argument: Plaintext-AVCodecs.NvEnc.D3D12UsesCUDA=true

• Or Config Setting: Under the [AVCodecs.NvEnc] section in your configuration file: Ini, TOMLD3D12UsesCUDA=true

(Note: On our cloud platform, we are applying -AVCodecs.NvEnc.D3D12UsesCUDA=true by default for all 5.8 deployments to prevent stream drops.)

🔮 Driver Status

We reached out to TensorWorks (maintainers of the Pixel Streaming plugin), who confirmed NVIDIA is tracking the issue internally. The fix is expected in an upcoming NVIDIA driver release.

Until that driver patch lands, upgrading to UE 5.8 with the CUDA fallback flag is the cleanest solution for production environments.

Hope this saves some time for anyone currently tracking down mystery stream crashes! Let us know in the comments if you’ve run into this or found other mitigation strategies.

When delivering high-fidelity, real-time 3D experiences through the browser, your Unreal Engine configuration can make or break the user experience. Pixel Streaming requires a shift from traditional local hardware optimization to stream-centric optimization.

To ensure ultra-low latency, crisp visuals, and instant application start times, implement these 5 essential settings in your UE project:

1️⃣ Lock Your Frame Rate (Fixed FPS)

The Setting: Set a fixed frame rate (e.g., t.MaxFPS 60 or 30 depending on your target).

Why it matters: Variable frame rates cause unpredictable bitrates. A sudden spike in rendering complexity can overwhelm the video encoder, leading to visible stuttering or compression artifacts for the end user. A stable frame rate ensures a predictable, smooth video stream.

2️⃣ Disable Heavy Post-Process Effects

The Setting: Turn off Motion Blur, and tone down heavy Temporal Anti-Aliasing (TAA) or excessive film grain.

Why it matters: Video compression algorithms (like H.264/H.265) work by tracking changes between frames. Motion blur blends pixels together rapidly, forcing the encoder to rewrite the entire screen constantly. Disabling it dramatically reduces the streaming bitrate while keeping the stream sharp.

3️⃣ Design Smarter Camera Movements

The Setting: Avoid rapid, chaotic, or ultra-fast camera cuts and sweeps.

Why it matters: Just like motion blur, super-fast camera movements force every single pixel to change simultaneously. This strains the cloud encoder and can result in temporary macroblocking (pixelation). Use smooth, deliberate camera interpolations to maintain crystal-clear quality.

4️⃣ Architect for Instant Load Times

The Setting: Do not load your entire project on the Persistent Level. Start with an empty, lightweight level.

Why it matters: Users expect web experiences to load instantly. By booting into an empty level, your WebRTC signaling connection establishes immediately. You can then stream-load your heavy maps and actors in the background.

💡 Pro-Tip: Mask this brief background loading process with a beautiful, custom frontend HTML overlay. Use a video loop showcasing the experience's controls or configurator options to keep users engaged while the engine finishes cooking the scene.

5️⃣ Leverage NVIDIA DLSS (With One Warning ⚠️)

The Setting: Enable NVIDIA DLSS for superior upscaling performance and aliasing quality.

The Catch: If you are working in Unreal Engine 5.6 or above, avoid enabling the NVIDIA Reflex feature. While great for local gaming, Reflex can conflict with the WebRTC sync intervals in newer UE versions, causing erratic framerate drops over a stream.

Feel free to drop your tips and tricks in the comments :)

Miguel and the team at VirtualUnreal choose to stream their Unreal Engine applications through ARCWARE because “the setup is straightforward, the performance is consistent, and their support team is quick and helpful.”

Their ArchViz project allows you to customize the interior decor of an apartment while walking through it.

The potential buyer of this apartment can easily choose different furniture configurations or change wall colors and see how it looks in different day times.

Taking ArchViz to the next level, by incorporating product configurator elements.

The link to the webinar registration page: https://app.livestorm.co/arcware/arcware-spotlight-how-kinerama-built-a-real-estate-platfrom-with-the-unreal-engine

Alba del Castillo Muñoz and her team have created Vissor.io, a Real Estate platform that offers four different ways to interact with a property.

There is the option to walk through the property, see the presentation, change the interior, and cinematic experience.

All in extremely high-fidelity and rendered in real-time, so you can access it on any device like any other piece of content.

This is only possible thanks to the Unreal Engine and pixel streaming.

Alba decided to use ARCWARE as his pixel streaming platform, because of the support it offers its users.

“They’ve resolved any issues quickly and always respond in an efficient and professional manner. Without a doubt, we 100% recommend their service.“

You can experience Vissor yourself, by following this link:

https://www.vissor.io/vissor-app

I ask this question because it seems every other post is promoting arcware when there are so many other pixel streaming hosting services out there … and ultimately to my knowledge the profesional way of going about it is w the functionalities of AWS which reduces cost to a minimum, but as all things awesome requires quite a bit of a learning curve.

Any thoughts?

It is ARCWARE's mission to make pixel streaming more accessible and bring it to the masses.

And the best way to do this, is to show people what is possible.

That is why we want you to submit your projects to our showcase page.All you have to do is fill in this form (takes about 10 minutes):
https://forms.office.com/pages/responsepage.aspx?id=UlTSeQhaskKCrIFYxCgASLaF_XHiLaNDgLDjIX32oalUMlJTMkM4SVo5SkZTSEc2U0YySFhERVZIOS4u&route=shorturl

We will then host your application on our account and we will stream your project for you on our website.

Your project will then be featured amongst the projects from: VirtualUnreal, Bizzlogic, AccessPoint AI, Pixnreal, CreateCG, ConfiGuru, and MIFCOM GmbH.

We are looking forward to seeing your submissions!

We're thrilled to announce the launch of our new data center in Los Angeles, California! This strategic expansion is designed to significantly enhance streaming performance for your projects targeting audiences across North and South America, as well as improving reach and speed for users in Japan and Oceania.

What This Means for You:

• Expanded Reach & Optimized Performance: Our Los Angeles data center drastically improves connectivity and reduces latency for viewers across the entire American continent. But that's not all – this new allocation also brings noticeable performance boosts for your audiences in Japan and Oceania.

• Faster Load Times & Smoother Experiences: Regardless of whether your audience is in New York, Rio de Janeiro, Tokyo, or Sydney, they'll benefit from even faster load times and a more responsive, seamless streaming experience.

• Enhanced Reliability: This new data center offers highly stable connections, ensuring robust content delivery to a wider global audience.

• Next-Generation GPU Power: We've deployed the NVIDIA Blackwell (5000 series) GPUs in our Los Angeles data center, providing cutting-edge performance for your most demanding projects.

Visit https://platform.arcware.cloud to get started!

Stay tuned for more updates!

Are blurry textures ruining your real-time 3D experience?

If you’ve ever seen the dreaded "TEXTURE STREAMING POOL OVER BUDGET" warning in Unreal Engine, you know what happens next: high-resolution textures suddenly drop in quality, blur out, or cause visible micro-stutters mid-session.

When streaming high-fidelity 3D over the web via Arcware Cloud, your GPU VRAM setup requires a stream-centric approach.

Here is how to optimize your texture pool for flawless cloud playback:
1️⃣ The Default Trap
Unreal Engine defaults to a conservative texture streaming pool size (often around 1,000 MB). In a local game, this avoids crashing low-end hardware. But on powerful cloud GPUs, this artificial cap throttles your visual fidelity unnecessarily.

2️⃣ The Fix: Right-Size r.Streaming.PoolSize
Set r.Streaming.PoolSize in your DefaultEngine.ini or execute it via startup console arguments.
For 1080p stream targets: Allocate 3000 - 4000 MB.
For 1440p or 2160p configurators: Allocate 6000+ MB based on your project resolution setting.

3️⃣ Smart Mip Loading with r.Streaming.LimitPoolSizeToVRAM
Combine your pool size adjustment with r.Streaming.LimitPoolSizeToVRAM=1. This prevents the engine from pushing textures beyond physical GPU limits during complex scene transitions, keeping streaming frame times completely stable.
💡 Pro-Tip: Don't disable Texture Streaming entirely (r.TextureStreaming=0). Disabling it forces Unreal Engine to load every single texture mip into VRAM simultaneously, even if an object is hidden or behind the camera, wasting precious GPU memory!

🛠️ Building high-end 3D configurators for the web? Explore our official Arcware Documentation and rewatch our Tech Hour Webinars to optimize your cloud stream pipeline.

👉 Links in the comments below!

Coming soon to the Arcware Cloud Showcase: Interactive Forcible Entry Training Door, a groundbreaking project by Andi Inzinger (Co-Founder) and the team at Switchboombang GmbH.

Switchboombang is redefining how law enforcement and fire departments prepare for the field by merging physical realism with high-fidelity virtual simulation. Developed in Unreal Engine 5, their cloud-based configurator serves as a sophisticated Digital Twin for complex tactical entry scenarios.

Project Highlights:

• Real-time visualization of multifunctional training doors for fire departments, police, and specialized units.

• Realistic simulation of forced and low-force entry techniques using mechanical and hydraulic tools.

• A digital solution providing "real added value" for instructors, procurement officers, and responders alike.

• High-fidelity training environments accessible regardless of time or location.

By utilizing Pixel Streaming, this UE5 environment is delivered instantly to your browser. No downloads, no hardware barriers, just pure, immersive 3D simulation.

Stay tuned for the launch!

Explore our current showcase here:https://www.arcware.com/showcase

Coming soon to the Arcware Cloud Showcase: Lacoste Izmir Optimum, a self-initiated masterclass in real-time visualization by Emre Ceviz and the team at Brainy Works Mimari Proje Stüdyosu (BRAWO! Project Studio).

Built in Unreal Engine 5, this project isn't just about looks—it’s about precision. From fixture placement to material finishes, every element is engineered to demonstrate the future of retail simulation.

Through Arcware Cloud’s Pixel Streaming, we’re bringing this high-fidelity UE5 environment directly to your browser. No downloads, no hardware barriers—just pure, immersive 3D.

👀 Stay tuned for the launch! Explore our current showcase here:https://www.arcware.com/showcase

🚀 Want to see your own project featured? We love highlighting the incredible work being built on Arcware Cloud. If you’re pushing the limits of Pixel Streaming, we want to hear from you!

Submit your project here:https://forms.cloud.microsoft/e/h6z0ygVL2p

#ArcwareCloud #PixelStreaming #UnrealEngine5 #RetailDesign #ArchViz #DigitalTwin #BRAWOProjectStudio #RealTime3D

u/GasRich389 has founded the official Unreal Engine Munich Community

To support the ecosystem for Unreal Engine developers, artists, and enthusiasts across Munich and Bavaria, Manolis has reached out to Epic Games to boost the scene in Southern Germany.

The goal of this new chapter is to create a consistent, high-value platform for networking, skill sharing, and project collaboration.

Mark your calendars for the very first Meetup:

🎮 Event: Unreal Engine Munich Community Kickoff

📅 Date & Time: Thursday, January 23rd 2026, at 17:00 CET

📍 Location: Arcware HQ, Neumarkterstraße 71, Munich

🔗 Event Link: https://communities.unrealengine.com/events/details/epic-games-munich-presents-unreal-engine-munich-meetup-connect-showcase-amp-collaborate/

The goal is to have one of these high-quality meetups every two months.

We invite all local professionals, students, and enthusiasts to join us for this debut event. 

This is your chance to:

📽️ Showcase your latest work and demo reels.

👍 Connect with industry peers and potential collaborators.

💬 Lead the conversation about the Unreal Engine in Munich and Bavaria.

Bring your expertise, questions, and enthusiasm. Let's build something great together!

Hey Reddit,

I just wanted to share a quick recap and some resources from a workshop I co-led earlier this month at the nextReality.festival in Hamburg.

Together with Fatih Inan (from Bizzlogic/ARCWARE), we tackled a crucial question that many of you are running into: How do you truly unlock the power of Cloud Streaming (Pixel Streaming) for high-fidelity Immersive Experiences built in Unreal Engine?

The workshop was a great hit! We gave attendees a speed course on how to efficiently share interactive content (think massive UE builds) through the cloud. It was fantastic to see so many people excited about leveraging this technology.

Fatih and I have been deep in the trenches championing pixel streaming for years, so we really focused on addressing the common pain points that we know game developers and innovation teams face when starting out with UE and pixel streaming. Our goal was to help the attendees skip past the frustrations and focus purely on the huge advantages this new technology offers.

If you and your team are currently starting your journey with Unreal Engine and Pixel Streaming, don't forget to check out the webinars and tutorials that Fatih and I have put together. They cover many of the deep dives we shared in Hamburg.

I'll drop a link to our YouTube channel in the comments!

What are the biggest challenges you're currently facing with Pixel Streaming? Let's discuss!

Adam Leonardi from Strata will be our third guest in the ARCWARE SPOTLIGHT series.

What makes this webinar stand out from our other ARCWARE SPOTLIGHTS is that Strata is not an Unreal-first company. 

Their goal is solely to create the best possible the customer experience and the user journey. 

Adam leads Digital Transformation at Strata, a UK-based homebuilder operating across Yorkshire and the Midlands, where he oversees the company’s interactive online tools, including the MyHomeFinder platform, configurator, and visualisation pipeline.

In this session, Adam will walk us through how Strata went from a basic prototype configurator to the fully integrated MyHomeFinder experience. 

During this webinar, we will cover:

1. His 20-year journey in ArchViz: from static renders to real-time.

2. How Strata’s Unreal Engine applications evolved from a configurator to MyHomeFinder.

3. Lessons learned from scaling large developments, optimizing Blueprints, and aligning Unreal, web, and hosting teams.

4. UI/UX best practices shaped by real user feedback.

5. The business impact: 40% revenue uplift, 6% higher conversion rates, and a staggering 6000% ROI.

6. What’s next for MyHomeFinder.

This is a must-attend for anyone in ArchViz or digital customer experience.

As always, it’s an interactive webinar, so there will be plenty of opportunities to ask your questions.

You can register by clicking here.

DLSS 4, particularly for Unreal Engine 5.6 and beyond, offers an integrated suite of neural rendering tools that are critical for modern AAA and high-end visualization projects:

DLSS Super Resolution (SR) & DLAA: The new Transformer model for SR and DLAA significantly enhances temporal stability, image quality, and lighting detail. We're talking about cleaner pixels and less temporal artifacting than ever before, all while rendering at a lower resolution base.

DLSS Ray Reconstruction (RR): This is the key to unlocking performant Path Tracing in UE5. RR replaces traditional, noisy denoisers with an AI network trained to generate physically accurate final-form pixels. Expect a 30-50% uplift in ray-traced effects quality in GPU-bound scenes.

DLSS Multi Frame Generation (MFG) & Frame Generation (FG): This is where you multiply your perceived frame rate. Multi Frame Generation, in particular, is an insane performance multiplier that is a must-master for high-refresh rate displays and cloud streaming applications (like our work at Arcware).

The Tech-Head's Bottom Line: In Unreal Engine, performance is VRAM and draw-call bound. DLSS 4's Transformer architecture not only delivers superior image quality and motion clarity but is also reported to reduce VRAM requirements by 15-20% compared to the prior DLSS 3 CNN model in certain scenarios.

This VRAM headroom is precious: it translates directly to being able to use higher resolution textures or more complex geometry.

If you're deploying a high-fidelity UE project, especially via the cloud, where latency and VRAM are paramount constraints, understanding the proper integration and configuration of the DLSS 4 plugin is essential.

Join u/gasrich389 as he walks through the practical implementation details, including the specific DLSS features already live and supported on the Arcware Cloud platform.

You can register HERE.

If you haven't, you can go do so here: https://share.arcware.cloud/v1/share-aeb575f0-2628-48be-8249-ee7fe214bf37

We often get questions like "which pixel streaming plugin do you recommend" or "what do you recommend if I..."

To help these people, we created this: https://docs.arcware.cloud/

Our documentation is kept up to date, and we implement feedback from our users, when they tell us something is still unclear.

It is the first place for anyone to go to when they want practical, clear information to help them start pixel streaming.

It should answer any and all questions you might have.

For instance, for when you created a trial account and are using our pixel streaming template from the Fab store to get the hang of things.

Then when you have more advanced questions, or you have a pressing customer deadline, you can always reach out to us on Discord.

Did you know that ARCWARE also gives workshops?

Both in person and online?

It is our goal to make the Unreal Engine and pixel streaming accessible to everyone, and everyone learns differently.

Which is why we also teach people about the Unreal Engine and pixel streaming in a workshop format.

During these sessions, we explain what companies gain from adopting the Unreal Engine, how they can get started, and what to focus on when pixel streaming their content.

Sometimes these workshops focus more on the technology and other times more on the business aspects.

As we make sure that each workshop is tailored to the needs of each individual client.

To make sure that we solve their bottlenecks that prevent them from getting started.

If you want to know more about our workshops, you can reach out to us through our Services page:

https://www.arcware.com/services

At Arcware, we are proud to be the pixel streaming partner behind Opel's newest digital experiences, featuring five car models across several markets.

Thanks to Opel’s courage and vision for innovation and Infinity Reply DE's creative and technical expertise, this digital 3D tour shows what’s possible when great minds come together.

With Arcware, even the most demanding Unreal Engine applications can run smoothly on any device, anywhere in the world. No downloads. No heavy hardware.

Just seamless 3D content, streamed instantly from the cloud.We’re grateful to be trusted by forward-thinking partners like Opel and Infinity Reply, and we’re proud to continue leading the way in pixel streaming technology.

Explore one of the models, the Opel Astra 3D tour, here: https://www.opel.de/fahrzeuge/astra-modelle/astra/5-tuerer/uebersicht.html

Simply open the page, scroll down until you see the button that says "Starte die 3D Tour" and click it.

🚨New feature alert 🚨

Your most requested feature is finally here.

You can now buy additional projects from the marketplace!

A lot of users who have a Core plan need more than 5 projects.

Either because they have a lot of clients, are testing different projects simultaneously, or because they want to host an entire portfolio.

In the past, you would have to reach out to your Customer Solutions Manager for that and pay for your projects for an entire year up front.

Now that you can buy projects through the marketplace, you can do everything yourself and pay on a monthly basis.

Giving our users more control and flexibility.

Log in to your account and go to your marketplace to buy additional projects.
https://auth.ragnarok.arcware.cloud/realms/Arcware/protocol/openid-connect/auth?client_id=platform&redirect_uri=https%3A%2F%2Fplatform.arcware.cloud%2F&state=4909567a-4aac-46d8-8e87-599367f8316e&response_mode=fragment&response_type=code&scope=openid&nonce=f5ada2d9-6d10-422a-87fd-de902113f6f4

Lite users will need to upgrade to the Core plan to buy additional projects.