A game-breaking bug.

The screen exhibits a radial pattern of black triangular tiles originating from a point near the center, fanning outward and covering the entire screen — a handful of triangles originate elsewhere but they are few. Faint traces of normal rendered content are visible in the gaps between them. The fractures follow radial lines, with the black regions growing progressively larger from the center toward the edges. The artifact appears the instant the camera enters a specific area and vanishes immediately upon leaving it. If the player steps out and immediately turns back, the artifact reappears without fail; if the player moves a sufficient distance away before returning, it sometimes does not recur. The flickering is high-frequency and synchronized across the entire screen, with no scanline-like tearing. This bug severely impacts normal gameplay and urgently needs a fix. The suspected cause is a light-assignment computation error in the clustered rendering pipeline at specific world-space coordinates, manifesting as cluster-level lighting dropouts triggered by the camera position.😵