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The Unreal Engine 5.4 game engine, announced a month ago, is now available to everyone game developers. One of the most important updates on the list was the improvement of TSR (Temporal Super Resolution) – an alternative to NVIDIA DLSS, AMD FSR and Intel XeSS.
TSR technology has one advantage over all these technologies: it is cross-platform and built into Unreal Engine, developers do not need to add any third-party plugins for it to work. The biggest problem was the quality of TSR compared to the competition, but the UE5 developers are clearly not giving up and are putting a lot of effort into improving it.
One of TSR's improvements is History Resurrection, a new feature for better anti-aliasing during upscaling. After TSR discards details for various reasons, such as occlusion, shading changes, or objects moving out of frame, the reaccumulation of information could cause artifacts. History Resurrection will store historical TSR data, which can be used to show data increments if a better match is not found in the latest frames. This feature will improve TSR stability and guarantee predictable results. Plus, it means less ghosting. Developers will also have new visualization modes to help them understand how TSR works and how it can be tuned to achieve specific performance targets.
The Unreal Engine authors also noticed that many game developers are targeting a 60Hz frame rate. In UE 5.4, significant efforts have been made to improve rendering performance. Systems have been restructured to provide better multitasking, and GPU-assisted instance culling has been introduced to improve hardware ray tracing. This update also includes optimizations for shader compilation, which helps your project load faster.
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Unreal Engine 5.4 introduces experimental support for Vulkan Ray Tracing. This essentially means that the Vulkan API is now DX12 compliant, as well as support for ray tracing on Linux. Developers will be able to use Hit Lighting mode in Lumen and Path tracing.
The release notes also mention that hardware ray tracing (HWRT) should improve performance with additional primitive types. It is claimed that Path tracing in Unreal Engine 5.4 is 15% faster than in 5.3. The game Marvel 1943: Rise of Hydra, which is shown in the teaser, will be one of the first to take advantage of Unreal Engine 5.4.
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