Custom RTX Branch of UE4.27 Drops, Global Illumination, Super Sampling, and Low Latency Solutions Level Up
Today, Unreal Engine developers receive access to several NVIDIA updates. Our custom branch of Unreal Engine 4.27 (NvRTX) improves Deep Learning Super Sampling (DLSS), RTX Global Illumination (RTXGI), RTX Direct Illumination (RTXDI), and NVIDIA Real-Time Denoisers (NRD). The Unreal Engine RTXGI plugin has been updated, making it easy to add the latest version of this global illumination SDK (1.1.40) to your game. And NVIDIA Reflex is now a standard feature in Unreal Engine 4.27. Details for each product are below.
NvRTX 4.27 (Download here)
NVIDIA has made it easy for game developers to add leading-edge technologies to their Unreal Engine (UE4) games by providing custom UE4 branches for NVIDIA technologies on GitHub. NvRTX 4.27 will shorten your development cycles and help make your games look even more stunning.
In NvRTX 4.27, RTX Direct Illumination (RTXDI) and NVIDIA Real-Time Denoisers (NRD) improved support for Metahuman hair. Deep Learning Super Sampling (DLSS) added softening capability to the sharpness slider, and provided a workaround for packaged builds not initializing DLSS on d3d11 devices. RTXGI increased the number of volumes supported in the indirect lighting pass from 6 to 12, made screen-space indirect lighting resolution adjustable through cvars, and supported blending of more than 2 volumes.
RTXGI 1.1.40 UE4 plugin (Download here)
Leveraging the power of ray tracing, RTXGI provides scalable solutions to compute multi-bounce indirect lighting without bake times, light leaks, or expensive per-frame costs. RTXGI is supported on any DXR-enabled GPU, and is an ideal starting point to bring the benefits of ray tracing to your existing tools, knowledge, and capabilities.
As in the NvRTX update, this plugin update doubles the number of volumes supported in the indirect lighting pass, enables developers to adjust screen-space indirect lighting resolution, and supports the blending of more than 2 volumes, among other features.
DLSS Unreal Engine Plugins for UE4.26, UE4.27, and UE5 (beta) (Download here)
NVIDIA DLSS is a new and improved deep learning neural network that boosts frame rates and generates beautiful, sharp images for your games. It gives you the performance headroom to maximize ray tracing settings and increase output resolution. DLSS is powered by dedicated AI processors on RTX GPUs called Tensor Cores.
All three versions of this update add softening capability to the sharpness slider, and provides a workaround for packaged builds not initializing DLSS on d3d11 devices, among other features.
Reflex (now available in Unreal Engine 4.27)
The NVIDIA Reflex SDK allows game developers to implement a low latency mode that aligns game engine work to complete just-in-time for rendering, eliminating the GPU render queue and reducing CPU back pressure in GPU-bound scenarios. As a developer, System Latency (click-to-display) can be one of the hardest metrics to optimize for. In addition to latency reduction functions, the SDK also features measurement markers to calculate both Game and Render Latency – great for debugging and in-game performance counters.
NVIDIA Reflex is now mainlined within UE4.27 and natively supported. To get started adding NVIDIA Reflex to your game, check out our easy step by step integration guide.