Portal with RTX brings stunning real-time ray-tracing to Valve’s classic, all without impacting how the original game felt to play. Make no mistake about it, this is cutting-edge stuff to the point that light travels through the portals you create and impacts the surrounding environments using the latest in RTX technologies.

Here’s a look at the first 30 minutes of Portal with RTX captured on a GeForce RTX 4090. A quick note: to capture this in 4K using a capture card DLSS 3’s Frame Generation had to be disabled. This means playing through Portal with RTX, as depicted in my full review, was done so without any performance issues or hitches.

Portal with RTX is a free DLC for all Portal owners developed by NVIDIA Lightspeed Studios. Experience the critically acclaimed and award-winning Portal reimagined with ray tracing.

Every frame of gameplay is upgraded with stunning full ray tracing, new, hand-crafted hi-res physically based textures, and new enhanced high-poly models evocative of the originals, all in stunning 4K. In Portal with RTX, full ray tracing transforms each level, enabling light to bounce and be affected by the scene’s geometry and materials. Every light is ray-traced and casts shadows, global illumination indirect lighting naturally illuminates and darkens rooms, volumetric ray-traced lighting scatters through fog and smoke, and shadows are pixel-perfect.

Portal with RTX is out on December 9.