The camera's 3D viewing cone—defined by near and far planes, field of view. Anything outside gets culled from render.
In 3D space, an invisible pyramid-shaped zone exists – the frustum. Everything within it is rendered; everything in front of or behind it disappears. As a VFX Supervisor or in motion design setup, you need to control this area, otherwise you'll lose performance, or important objects will disappear mid-shot.
The frustum is defined by four parameters: Near Plane, Far Plane, Field of View (horizontal or vertical angle of view), and the Aspect Ratio of the output format. In practical workflow, this means: if you set the Near Plane to 0.1 units, nothing closer to the virtual camera will be rendered. Conversely, a Far Plane of 10,000 units can lead to unnecessary processing if your scene ends at 5,000 anyway. Every software – Maya, Cinema 4D, Blender, Houdini – visualizes this cone differently, but the principle remains the same.
In the motion graphics context, this becomes critical when you use volumetric effects, particle systems, or depth-of-field calculations. If you render a particle emitter outside the frustum, it won't exist in the output sequence, despite a correct simulation. This often happens unconsciously during large camera pull-outs or drone shots with wide-angle lenses. The Near Plane is set too far back, and your close-up is gone. Conversely, if you set the Far Plane too close, your distant geometry will clip – visible in compositing as messy edges.
Best practice on set (or in the VFX suite): Enable Frustum Visualization. Every 3D engine will show you the cone outline if you wish. This allows you to immediately check if effects, lighting, or geometry are being lost. For VFX-heavy shots – especially with camera movements through complex scenes – you should also check the frustum area in relation to the scene scale. If your team works in centimeters but the camera in meters, clipping errors can quickly arise. An additional step before rendering: perform a frustum check in the render settings and document the parameters in the asset export. This saves re-renders.