在三维计算机图形学中，视体（英语：viewing frustum）又称视景体、视锥，是三维世界中在屏幕上可见的区域，即虚拟摄像机的视野。

该区域的实际形状依所模拟的摄像机镜头而定，但顾名思义，其常见的形状是方平截头体。将四棱锥截为平截头体的两个平面称作**面 和远平面。如果某个物体到摄像机的距离比**面近或比远平面远，那幺这个物体不会被显示。

视体剔除（英语：Viewing frustum culling）指将完全处于视体外的物体移出渲染流程的过程。为了加速剔除过程，通常使用物体的包围体而不是物体本身来进行位置比较。

In 3D computer graphics, the view frustum (also called viewing frustum) is the region of space in the modeled world that may appear on the screen; it is the field of view of the notional camera.

The view frustum is typically obtained by taking a frustum—that is a truncation with parallel planes—of the pyramid of vision, which is the adaptation of (idealized) cone of vision that a camera or eye would have to the rectangular viewports typically used in computer graphics. Some authors use pyramid of vision as a synonym for view frustum itself, i.e. consider it truncated.