A view frustum is the 3D volume that a camera can see and render. It is usually shaped like a truncated pyramid: objects inside the near and far clipping planes, and within the camera’s field of view, are eligible to appear on screen; objects outside are clipped or skipped. Graphics engines use frustum culling to avoid drawing unseen geometry, which improves speed and reduces GPU workload.
In cyber security, the term matters because many attacks target the rendering pipeline that processes camera views, 3D models, and browser-based graphics. Malformed scenes, shaders, or assets can crash a game, viewer, or WebGL application, creating denial-of-service conditions or exposing bugs in graphics libraries and drivers. Defenders use strict asset validation, sane clipping limits, and patched rendering components to reduce that risk. In practice, understanding the frustum helps explain both performance behavior and why untrusted visual content must be handled carefully.