Paraverse Technology
Contact Us
Schedule A Call
Request A Testing
Paraverse Technology
Product Updates

UE Cloud Rendering | LarkXR Developer FAQ

4 March 2025
cover square
LarkXR Knowledge Base 2025 Issue 1:  UE Cloud Rendering FAQ
LarkXR Solutions for UE Project Compatibility, Deployment & Debugging
 

Paraverse’s LarkXR is a cutting-edge cloud rendering solution for XR developers. It leverages GPU virtualization, graphics containerization, and advanced codecs to enable seamless cloud deployment and cross-device operation. As the industry’s leading real-time cloud rendering platform, LarkXR offers unparalleled UE optimization support. UE has become the preferred tool for over 70% of LarkXR cloud deployments, with full support for all versions up to UE5.5.

This FAQ addresses critical UE cloud rendering challenges, focusing on overcoming technical bottlenecks and optimizing deployment workflows to accelerate the scaling of commercial UE applications.

Section 1.
UE Version Compatibility

Q1: Does LarkXR support UE5?

Yes! LarkXR supports all official UE versions, including the latest UE5.5, with full functionality.

Q2: Does LarkXR support pixel streaming?

LarkXR natively supports streaming functionality.

You don't need to package the pixel streaming plugin. Even if it's already packaged, no additional steps are required. Simply upload the exe file directly.

Beyond streaming, LarkXR offers end-to-end capabilities covering cloud, network, device, and PaaS platforms.
In addition to industry-leading streaming performance, LarkXR provides the following enhanced features:

Enterprise-Grade Full-Stack PaaS (compute and application management on the cloud, network-layer streaming optimization, and heterogeneous device access)

Support for UE applications with resolutions above 8K

Single-server support for 5+ concurrent user accesses

Section 2.
Deployment and Configuration

Q3: How to set the UE program path correctly?

Method 1
  1. Launch the outermost EXE locally.
  2. Open Task Manager and check the command line to locate the actual running EXE path and launch parameters. (If the command line is not displayed, right-click the status bar and select “Command Line.”)
Method 2
On the rendering node, launch the program and check the process name in Task Manager. Use the command line tool and enter:
wmic process where caption=”FaceGoodLiveLink-Win64-Shipping.exe” get caption, command line /value
The green box in the query result shows the launch parameters.
After identifying the executable path and launch parameters, configure them in the location shown below. When uploading a ZIP package, LarkXR will automatically list executable files for selection. Choose the correct path and enter the appropriate launch parameters.

Q4: Can UE applications utilize multiple GPUs on a rendering node?

Yes. Regardless of GPU load on the server, streaming will function normally.

For multi-GPU rendering nodes, to ensure optimal system performance, users can configure the GPU concurrency limit. This prevents performance degradation when multiple applications are assigned to a single node.

The configuration file is located in the rendering node deployment folder, e.g., C:\Larkxr-render-windows\application.properties

Example: For a rendering node with 2 GPUs, each running 5 concurrent tasks:
oxv.render-server.cpu-cnt=2
pxy.render-server.gpu-max-concurrent-cnt=5

Q5: How to use the data channel plugin in UE-developed programs?

The data channel enables bidirectional communication between the client and the application, widely used in digital twin, exhibition, and metaverse scenarios.

  1. Ensure your license key has the “Data Channel” feature enabled.
  2. Follow the integration steps in the case study:
    https://paraversetechnology.github.io/datachannel/ue4_datachannel_blueprint.html

Section 3.
Usage and Secondary Development

Q6: Why can't local videos load when using the Media Player in UE projects?

For private deployments, switch the application type to “Normal Mode” and try again.

For hosted platforms, switch to “2D Mode.” Additionally, if the video is stored locally, uploading the application to the hosted platform means it won’t find the video on the cloud server.

Q7: Can I debug in the UE Editor?

Yes. For UE programs with extensive features that need to be packaged and published to LarkXR, there are two debugging methods:

Option 1
  1. Publish to LarkXR’s management backend.
  2. Create a test web page for testing.
Option 2: Debug within the UE Editor.
  1. Generate a VS project, then build and launch the debug version of the EXE.
  2. Set the platform launch path to the debug version’s path, and attach the process in VS for debugging.

Q8: Can cloud rendering work without a monitor connected to the server?

Yes. Just ensure the following:

  1. LarkXR version V3.3.2.0 or higher is installed.
  2. In 3D shared mode, specify the initial resolution in the launch parameters to ensure the application outputs at the correct resolution. Otherwise, it may run at the integrated GPU’s low resolution initially.

Launch Parameter Example for UE
-windowed -ForceRes -ResX=1920 -ResY=1080
-windowed: Forces windowed mode.
-ForceRes: Forces the specified resolution.
-ResX=1920: Sets horizontal resolution to 1920.
-ResY=1080: Sets vertical resolution to 1080.

Configuration Location
When adding a program package, enter the launch parameters as shown below:

Unlock the full potential of cloud-rendered UE experiences with Paraverse’s cutting-edge LarkXR platform.
Explore our comprehensive UE Streaming Solution and revolutionize your UE project workflow today!

Tags:
Go to Top