In the context of computer graphics and 3D modeling, a rigid scene refers to a scene in which all objects are considered to be rigid bodies that do not deform or change shape. This means that the objects in the scene do not bend or stretch and maintain a fixed shape.

Rigid scenes are often used in computer simulations and game engines because they are computationally simpler to simulate and render than scenes with deformable objects. They are also useful for modeling real-world objects that do not deform significantly under normal conditions, such as furniture, buildings, and vehicles.

In contrast, non-rigid scenes involve objects that can change shape or deform, such as cloth, rubber, and other materials that are subject to external forces. Non-rigid scenes are typically more complex to simulate and render, but can be used to create more realistic and believable animations and simulations.