NVIDIA RTXの革新がゲーム開発の新時代を牽引

NVIDIA RTX ray tracing and AI-powered neural rendering technologies are redefining how games are made, enabling a new standard for visuals and performance. At GDC 2026, NVIDIA unveiled the latest path tracing innovations elevating visual fidelity, on-device AI models enabling players to interact with their favorite experiences in new ways, and enterprise solutions accelerating game development from the ground up.

This post provides a detailed overview of these latest innovations, including:

Introducing a new system for dense, path-traced foliage in NVIDIA RTX Mega Geometry

Adding path-traced indirect lighting with ReSTIR PT in the NVIDIA RTX Dynamic Illumination SDK and RTX Hair (beta) for strand-based acceleration in the NVIDIA branch of UE5

Expanding language recognition support in NVIDIA ACE; production-quality on-device text-to-speech (TTS); a small language model (SML) with advanced agent capabilities for AI-powered game characters

Enabling foveated game streaming for Apple Vision Pro with NVIDIA CloudXR 6.0

Accelerating in-game AI and streamlined shader compilation with new DirectX APIs

Centralizing infrastructure and virtualized game studio workflows with NVIDIA RTX PRO 6000 Blackwell Server Edition

Enabling scaling AI coding assistants with new NVIDIA Enterprise AI playbook

Scaling game playtesting and player engagement globally with GeForce NOW Playtest

New system for path-traced foliage in NVIDIA RTX Mega Geometry

NVIDIA RTX Mega Geometry is a breakthrough technology that delivers unprecedented geometric detail to path‑traced worlds. Introduced last year, it compresses geometry into clusters and intelligently reuses them per frame as a world is traversed. Mega Geometry enables developers to build ray tracing structures 100x faster than previous methods, enabling full‑fidelity path tracing with advanced detail and real‑time tessellation.

Remedy Entertainment applied RTX Mega Geometry to existing assets in Alan Wake 2, which saw a 5-20% boost in FPS and 300 MB VRAM reduction. Their upcoming title, CONTROL Resonant will also feature RTX Mega Geometry.

Figure 1. NVIDIA RTX Mega Geometry was used to boost path tracing performance in Alan Wake 2

At GDC 2026, NVIDIA is offering a sneak peek into the new RTX Mega Geometry foliage system. Large natural environments such as forests remain a major challenge for real‑time ray tracing. These scenes pack countless complex, animated objects that heavily tax how quickly the GPU can build acceleration structures.

To tackle this challenge, NVIDIA is developing a new foliage system that uses partitioned top-level acceleration structures. This system instances and updates massive portions of a scene in every single frame. This advancement makes it possible, for the first time, to path trace dense environments featuring millions of detailed, uniquely animated foliage elements.

NVIDIA has partnered with CD PROJEKT RED to bring this new foliage technology to future titles. “Using the in-development RTX Mega Geometry foliage technology, we can bring fully path traced forests to the world of The Witcher,” said Cezary Bella, Rendering Engineer at CD PROJEKT RED. “We can’t wait for players to experience this level of detail in The Witcher 4.”

Video 1. New NVIDIA RTX Mega Geometry foliage system, enabling path tracing of dense environments with millions of detailed plants and trees, coming to The Witcher 4

Optimizing path-traced mirror reflections and strand-based hair in NVIDIA RTX Kit

This latest 2026.2 version of NVIDIA RTX Kit suite of neural rendering technologies expands the RTX Dynamic Illumination SDK with ReSTIR PT. This algorithm enables complex path reuse at any bounce, even on challenging surfaces. It provides a high-fidelity path tracing solution specifically optimized for glossy surfaces and mirror reflections.

Figure 2. The ReSTIR PT algorithm enables full resolution mirror reflections

Several additional RTX Kit SDKs have also been updated, including:

RTX Global Illumination: SHaRC improvements, integration of DLSS-RR, and various bug fixes

RTX Character Rendering: Expanded geometry library with refactored tessellation API

RTX Path Tracing: Various performance optimizations lowering the memory footprint and increasing frame rate

RTX Neural Shaders: Bug fixes and improvements

Download the latest NVIDIA RTX Kit.

For Unreal Engine 5 developers, the NVIDIA RTX Branch of Unreal Engine (NvRTX) 5.7 provides the latest compatibility and performance updates. Launching on March 24, the update introduces Linear Swept Sphere (LSS) in beta, which leverages GeForce RTX 50 Series GPUs to provide superior speed and memory efficiency for path-traced, strand-based hair.

Video 2. Learn how to install and compile the NVIDIA RTX Branch of Unreal Engine 5.7

Finally, DLSS 4.5 Super Resolution featuring a second-generation transformer model will be available in NvRTX, also on March 24.

First on-device production-quality TTS model in NVIDIA ACE

AI is evolving traditional non-playable character (NPC) roles into dynamic collaborators. Game developer Creative Assembly is enhancing Total War: Pharaoh with a natural language advisor to guide new players. Krafton is leveraging AI for interactive teammates in PUBG: Battlegrounds and personalized stories in inZOI.

AI tech developer Meaning Machine is presenting research at GDC that was conducted with the University of Bristol. This research uses the demo Blood Will Out, which features NVIDIA TTS and facial animation models with Meaning Machine Authored AI systems, to explore how narrative AI shapes player behavior. To learn more, check out the GDC session, What Good Are AI NPCs? Lessons from a Large-Scale Player Study.

NVIDIA ACE has updated its suite of open source, on-device models with new speech and intelligence models, including its first production quality text-to-speech model. Optimized for latency and efficient VRAM usage, these models use cutting-edge distillation and pruning techniques to run seamlessly on RTX PCs.

NVIDIA Riva v1.1: Fast, accurate automatic speech recognition (ASR) now has a reduced memory footprint and support for English, Chinese, Korean, French, German, Italian, and Japanese.

NVIDIA Nemotron 3 Nano 4B (coming next week): New SLM with strong instruction following, game agent capabilities, and VRAM scaling with support for hybrid reasoning and thinking budget.

Resemble.ai Chatterbox v1.0.0: A 350M TTS model with paralinguistic tags and zero-shot voice cloning. These features provide expressive voices with emotional and nonverbal control.

Figure 3. Comparison of SLM quality to VRAM scaling at 16K input sequence length

NVIDIA collaborated with Resemble.AI, a leading provider of open source voice AI, to bring the latest Resemble.AI TTS model on-device. By optimizing for on-device inference alongside game graphics, developers can now deploy more voice agents without the overhead of cloud inference.

“High-quality emotional voices within a small memory footprint will scale the number of interactive characters in games,” said Zohaib Ahmed, CEO of Resemble.AI. “We collaborated with NVIDIA to ensure voice quality and performance were production quality out of the box.”

Get started with the latest NVIDIA ACE models and sign up for early access to new ACE technologies.

Foveated game streaming for Apple Vision Pro with NVIDIA CloudXR 6.0

Spatial computing adds a new dimension to gaming by giving players a whole new way to experience their favorite games. Later this spring, with NVIDIA CloudXR 6.0 for visionOS, Apple Vision Pro users can stream immersive PC and cloud experiences from NVIDIA RTX systems. This integration creates a direct bridge between visionOS and RTX-powered game rendering. iRacing, a highly realistic motorsport racing simulator, and X-Plane 12, a professional-grade flight simulator, will support this feature at launch.

Figure 4. X-Plane 12 on Apple Vision Pro streamed from GeForce RTX 5090 to a RealSimGear cockpit simulator

NVIDIA CloudXR is a streaming platform built to deliver high-fidelity, low-latency XR from a local RTX PC or cloud GPU. CloudXR 6.0 adds visionOS integration with privacy-preserving foveated streaming, which helps developers deliver better visual quality and performance without rebuilding content for standalone hardware. For developers, this means faster iteration, easier deployment of demanding spatial workloads, and a practical path to bring PC-class experiences to Apple Vision Pro.

Learn more about NVIDIA CloudXR for visionOS.

Accelerating in-game AI with new DirectX APIs

Integrating AI into games presents a significant challenge, as AI workloads must execute in milliseconds without compromising the GPU rendering high FPS gameplay. Current integration methods are often fragmented across IHV solutions, forcing operations to execute layer-by-layer and incurring high performance overhead.

Furthermore, because AI tasks frequently run out of sync with primary rendering and simulation pipelines, the resulting GPU context-switching further diminishes efficiency and leads to suboptimal performance.

In collaboration with Microsoft, NVIDIA is standardizing hardware-accelerated AI through DirectX. This collaboration will boost GPU efficiency, eliminate context-switching for smoother gameplay, and provide a unified workflow for the broader development community.

Figure 5. New DirectX APIs accelerate AI workloads throughout the gaming pipeline. Image credit: Microsoft

Building on last summer’s preview of Cooperative Vector support, which enabled developers to accelerate AI workloads such as neural texture compression through Tensor Cores, Microsoft plans to release DirectX Linear Algebra and DirectX Compute Graph Compiler to accelerate the entire gaming pipeline. To learn more, read the Microsoft DirectX Developer Blog.

Shader compilation for the gaming ecosystem

Microsoft and NVIDIA are working to address two major pain points in PC gaming—long compilation times and in-game stuttering—by evolving how shaders are handled. While these issues typically stem from compiling shaders at runtime, the Microsoft Advanced Shader Delivery (ASD) eliminates the bottleneck by distributing precompiled shaders directly during the game download.

Figure 6. Microsoft Advanced Shader Delivery (ASD) brings uncompiled shaders to compiled shaders

NVIDIA is collaborating closely with Microsoft to bring ASD to GeForce RTX users later this year. Developers can check out the latest Advanced Shader Delivery blog post to learn how to precompile and deliver shaders through the Xbox store.

Centralizing studio workflows with NVIDIA RTX PRO Server and NVIDIA Virtual GPU

NVIDIA is showcasing a new approach to centralizing studio workflows across content creation, engineering, AI, and QA with NVIDIA RTX PRO Server. Built on NVIDIA RTX PRO 6000 Blackwell Server Edition GPUs and NVIDIA Virtual GPU (vGPU) software, the platform enables studios to move key development workflows onto shared, centralized infrastructure without giving up the responsiveness and visual fidelity teams expect from workstation-class systems.

Instead of scaling one desk-bound GPU at a time, studios can provision high-performance virtual environments for geographically distributed teams, improving infrastructure consistency and making it easier to support parallel development across locations.

Figure 7. NVIDIA RTX PRO Server can help standardize environments and reduce operational friction across complex pipelines

This virtualized model is designed to help studios consolidate graphics and AI workloads on the same foundation while improving utilization, security, and scalability. With up to 96 GB of VRAM per GPU and support for multitenant environments, NVIDIA RTX PRO Server can support artists, developers, AI researchers, and QA on shared infrastructure, helping standardize environments and reduce operational friction across complex pipelines.

The result is a more flexible studio architecture that can scale with modern production demands while keeping teams closely aligned around the same centralized resources. To learn more, see NVIDIA Virtualizes Game Development With RTX PRO Server.

Accelerating AI-assisted coding for game development

NVIDIA also released an AI Code Assistant Playbook to help studios scale AI-assisted coding from individual Unreal Engine workflows to enterprise-wide deployments. By leveraging AST-aware chunking, MCP integrations, and fine-tuned models for large codebases, the guide aims to boost developer velocity while ensuring compatibility with complex studio pipelines. To learn more, see Reliable AI Coding for Unreal Engine: Improving Accuracy and Reducing Token Costs.

Scaling game playtesting and player engagement globally with GeForce NOW Playtest

GeForce NOW offers a suite of cloud tools that support stages of the game lifecycle—from playtesting to player engagement. For game publishers and studios, GeForce NOW Playtest provides cloud-based virtualization to streamline large-scale testing of games before they are released. It replaces weeks of local environment setup with on-demand hardware in the cloud, enabling secure testing across more than 100 countries.

With features including instant streaming, real-time observability, and video recording for offline viewing, GeForce NOW helps teams working across different locations bridge communication gaps and identify issues at scale.

Figure 8. GeForce NOW enables game developers to securely test games across devices in more than 100 countries

To get started, check out the Install-to-Play Test Application to quickly test your Steam game in the cloud. You can also watch the video walkthrough How to Publish Your Game on NVIDIA GeForce NOW. Explore these capabilities and learn more at the GDC session, Scaling Playtesting Reach with GeForce NOW.

GeForce NOW also powers Discord Instant Play Quests, which enable users to play games from the cloud directly in Discord—no additional downloads or installs required. They combine instant play, rewards, and Discord’s social networks and communities into game trial and engagement. These Instant Play Quests will be available for select games on GeForce NOW.

Get started with new NVIDIA RTX technologies

Join NVIDIA at GDC 2026 this week to explore how NVIDIA RTX neural rendering and AI are defining the next era of gaming. Glimpse into the future of game development with John Spitzer, VP, Developer, and Performance Technology at NVIDIA, as he unveils innovations in path tracing and generative AI workflows. Catch up with Bryan Catanzaro, VP, Applied Deep Learning Research at NVIDIA, for an interactive Ask Me Anything on the latest AI trends. The two full days of sessions offer a front-row seat to the technologies unlocking new player experiences.

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