AMD has officially unveiled its FSR Redstone update, a significant evolution of its FidelityFX Super Resolution technology suite. While the launch introduces powerful new AI-driven features like Ray Regeneration and Radiance Caching, the immediate availability and game support for these cutting-edge tools vary significantly, with one flagship feature already confirmed as not ready for prime time.
AMD's FSR Redstone Suite Arrives with a Mix of Ready and Experimental Tech
Today, December 10, 2025, AMD launched the FSR Redstone update, packaging several technologies under one banner. The suite includes FSR Upscaling (an improved version of what was previously called FSR 4), FSR Frame Generation, and two brand-new, AI-powered features: FSR Ray Regeneration and FSR Radiance Caching. This release represents AMD's continued push to compete in the high-end graphics feature space, directly challenging NVIDIA's ecosystem of DLSS, Frame Generation, and Ray Reconstruction.
FSR Redstone Component Breakdown:
- FSR Upscaling: The spatial upscaler, formerly known as FSR 4. Reported support in over 200 games.
- FSR Frame Generation: AMD's frame interpolation technology.
- FSR Ray Regeneration: An AI denoiser for ray-traced effects. Currently supported only in Call of Duty: Black Ops 7.
- FSR Radiance Caching: An experimental AI-powered global illumination cache for path tracing. Not yet planned for release in any live game.
FSR Ray Regeneration Debuts as AMD's Answer to NVIDIA's Tech
FSR Ray Regeneration is positioned as AMD's counterpart to NVIDIA's DLSS Ray Reconstruction. Developed in partnership with Microsoft, it is a machine learning-based denoiser designed to restore detail to ray-traced effects, which can often appear blurry or noisy in upscaled scenes. Unlike some of its sibling technologies, Ray Regeneration is not merely a demo; it has already seen its first implementation in Call of Duty: Black Ops 7, marking a tangible, if limited, rollout for the new feature.
The Curious Case of FSR Radiance Caching: A Demo, Not a Delivery
The story for FSR Radiance Caching is markedly different. AMD showcased a tech demo of this feature running in Warhammer 40,000: Darktide, leading many to believe the game would be its launch vehicle. However, developer Fatshark quickly clarified the situation in a press release. They stated that the technology showcased is "experimental" and "requires further development, optimization, and quality verification before it could be integrated into a live service game." Consequently, FSR Radiance Caching is not currently planned for release in Darktide or any other title at this time. Fatshark's CTO emphasized the collaborative and forward-looking nature of the demo, calling it a "long-term investment" in gaming technology.
Understanding the Promise and Limits of Radiance Caching
Described in the newly released SDK, FSR Radiance Caching is a "state-of-the-art illumination cache" meant to work with Monte Carlo path tracing. Its core is an online machine learning model that trains in real-time on complex global illumination, aiming to deliver richer, dynamic lighting without pre-computation. This description aligns it closely with NVIDIA's RTX Neural Radiance Cache, another ML-accelerated path tracing technique currently featured in Portal with RTX. The delay highlights the significant challenge of translating a promising tech demo into a stable, performant feature for public game builds.
Hardware Requirements and Current Game Support Landscape
Access to the full FSR Redstone suite is currently exclusive to owners of AMD's latest Radeon RX 9000-series graphics cards, continuing the industry trend of reserving the latest AI features for the newest hardware. While the more affordable pricing of cards like the XFX Swift AMD Radeon RX 9070 XT, noted at USD 669.99, is a point in AMD's favor, the practical benefits are currently constrained. Support for the flagship new features is extremely narrow; Ray Regeneration is in one game, and Radiance Caching is in none. The most immediately useful component for most users remains FSR Upscaling, which reportedly now supports over 200 games.
Hardware Requirement: Full FSR Redstone support is currently limited to AMD Radeon RX 9000-series GPUs.
A Launch That Points to the Future, With Caveats for the Present
AMD's FSR Redstone launch is a clear statement of ambition, showcasing a roadmap that includes sophisticated, AI-driven rendering techniques. The immediate reality, however, is a staggered and incomplete rollout. One key feature is experimental and undated, another is in a single game, and the entire package is gated behind the latest GPUs. For consumers, the value proposition today hinges almost entirely on the mature FSR Upscaling technology. The promise of Radiance Caching and broader Ray Regeneration support points to a compelling future for AMD's graphics ecosystem, but that future is still under development.