Unreal Engine's Free Arm ASR Plugin Brings Superior Mobile Graphics Upscaling

Mobile game developers now have a free tool to wring dramatically better performance out of their games without sacrificing battery life or visual fidelity. Arm's Accuracy Super Resolution plugin for Unreal Engine is live on Epic's Fab store, compatible with versions 5.3, 5.4, and 5.5, and its initial public release marks one of the more consequential technical drops for mobile game dev in recent memory.

Arm ASR is a temporal upscaling technique built on AMD's FidelityFX Super Resolution 2 v2.2.2, with additional optimizations layered on top to account for the tighter resource constraints of mobile hardware. The GitHub release, labeled "25.06 Release," credits AMD directly: the Arm ASR team expressed "gratitude to AMD and the engineers behind the original technique for their work and releasing it publicly to the world."

The performance figures being cited vary by test context but are consistently striking. In Arm's own "Mori" demo, an Unreal Engine 5 project using its desktop renderer for mobile, enabling the plugin improved frames per second by up to 30% with no discernible loss in visual quality and measurable power savings. Earlier claims put the uplift at up to 53% over native resolution, and a separate video demonstrates an 87% performance gain at 2x upscaling on the Immortalis-G720 GPU. Developers can choose between 1.5x, 1.7x, and 2x upscaling settings depending on whether they want to prioritize image quality or raw throughput.

"For years, a fundamental challenge has plagued mobile game developers: how to strike the perfect balance between visuals and performance," reads one description of the technology. "Thanks to ASR, that difficult choice will be less of a problem."

Integration is designed to be lightweight. The process involves enabling the Arm ASR plugin, configuring project settings to use Temporal Anti-Aliasing, and verifying the setup through console commands. The experience kit available from Arm includes source code, the plugin itself, and tutorial and sample materials. Documentation is also available as an Arm Learning path with an accompanying tutorial video.

Studios aren't waiting around to see how this shakes out. Enduring Games, Infold Games, and Sumo Digital have already integrated Arm ASR into their development pipelines. A Unity plugin is in active development and expected before the end of the year, which would extend the technology to one of the other dominant engines in mobile game production.

The plugin's technical backbone, the UE::Renderer::Private::ITemporalUpscaler interface, is exposed through the release, and the GitHub repository's release notes acknowledge known issues that will be addressed in a future update. For studios already building on Unreal Engine 5, though, the plugin is available to pull and integrate right now through Epic's Fab store.