Inside the Tech Behind GTA 6’s Viral “Vampire Ferris Wheel”

As Rockstar Games gears up to open digital pre-orders for Grand Theft Auto VI, the tech community is doing what it does best: analyzing every single pixel of promotional footage. Following a recent website update, eagle-eyed fans on X (formerly Twitter) and Reddit noticed a bizarre rendering anomaly in a looping, high-fidelity video of the Vice City skyline at night.

While the neon skyscrapers of the city cast stunning, shimmering reflections across the bay, a brightly lit Ferris wheel on the far side of the water completely failed to cast a reflection. The community quickly dubbed it the “Vampire Ferris Wheel,” prompting tech analysis giant Digital Foundry to step in and investigate the mystery under a microscope.

---

The Science of Hybrid Reflections: SSR vs. Ray Tracing

Modern open-world games rarely rely on a single graphics technique for reflections. Instead, the updated proprietary Rockstar Advanced Game Engine (RAGE) employs a hybrid approach, combining Screen Space Reflections (SSR) and hardware-accelerated Ray-Traced (RT) Reflections.

• Screen Space Reflections (SSR): A cheaper, raster-based technique that mirrors what is already visible on the player's screen. SSR fails when objects are obscured or off-screen, creating noticeable pop-in artifacts.
• Ray-Traced Reflections: A highly realistic, physically-based technique that fires rays into a simplified 3D version of the game world to determine what is reflected, regardless of whether it is visible on screen.

---

Enter the BVH: The Ray Tracing "Guest List"

To render ray-traced reflections, a game engine builds a database of the world's geometry known as the Bounding Volume Hierarchy (BVH). When a ray is fired from the water’s surface, it tests for intersections against the objects registered inside this BVH.

However, rendering ray tracing in real-time is incredibly taxing on current-gen consoles like the PlayStation 5 and Xbox Series X. To maintain a stable 30fps target, Rockstar’s engineers must make strict performance compromises.

The missing Ferris wheel reflection is a prime example of BVH culling. Because the Ferris wheel is far in the distance, developers actively choose to leave it off the BVH "guest list". This saves precious GPU cycles without degrading the overall visual impact for players navigating at street level.

---

What This Tells Us About GTA 6

Rockstar's recently released batch of 63 ultra-high-fidelity screenshots—showing immaculate RT reflections across wet leather seats, vehicle hoods, and gun barrels—suggests a game running near native 4K. However, Digital Foundry suspects these screenshots were taken within a developer environment with settings cranked to the absolute maximum.

The "Vampire Ferris Wheel" gaffe is actually incredibly reassuring: it proves that Rockstar is showing us real, unvarnished in-engine footage. It gives the technical community a rare, fascinating look at the performance compromises required to deliver the most immersive, ray-traced open world ever made.