DLSS 5 arrives in Portal with RTX and Half-Life 2 RTX
NVIDIA's latest neural-rendering update reaches two RTX Remix projects, bringing optional DLSS 5 and up to 6X Multi Frame Generation to compatible hardware.
NVIDIA has brought DLSS 5 with 3D-Guided Neural Rendering to Portal with RTX and the Half-Life 2 RTX demo. The two RTX Remix projects also gain newer frame-generation options, including up to 6X Multi Frame Generation on compatible GeForce RTX 50 Series hardware.123
The update puts NVIDIA's newest neural-rendering model into two playable, path-traced projects. Portal with RTX received its update on October 21, while the Half-Life 2 RTX demo followed on October 23.1
What is changing
DLSS 5 is different from Super Resolution, which reconstructs a higher-resolution image, and Frame Generation, which creates extra frames. NVIDIA describes 3D-Guided Neural Rendering as a final stage that uses the rendered image and motion vectors to improve lighting, materials and fine detail while remaining tied to the original scene.2
Players can access the new controls through the RTX Remix overlay by pressing Alt + X. DLSS 5 Neural Rendering is optional and disabled by default. The Portal with RTX update also adds DLSS Frame Generation Performance Mode, 5X and 6X Multi Frame Generation, and native Windows on ARM support, according to the official Steam changelog.13
Hardware limits and the unfinished remaster
Official DLSS 5 Neural Rendering support remains limited to GeForce RTX 50 Series GPUs and RTX Spark hardware. Frame Generation Preset C supports RTX 40 Series GPUs, while 5X and 6X Multi Frame Generation require compatible RTX 50 Series cards.1
The update affects the currently available Half-Life 2 RTX demo, not the full remaster, which remains in development at Orbifold Studios. NVIDIA has also supplied controls for modders to choose neural-rendering models, adjust intensity and exclude selected objects or materials.12
Our opinion
The practical appeal is clear: two familiar games now offer a conspicuous test bed for NVIDIA's latest attempt to make path tracing look richer without treating every improvement as a simple resolution scale. The useful question is whether players prefer the result at a sensible performance cost. Because DLSS 5 is optional, both projects can answer that question directly, provided users compare the neural-rendered image with conventional path-traced output rather than relying on headline frame-rate multipliers alone.