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Virtual Filmmaking with Unreal Engine 5
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In the context of 3D computer graphics, a material ID (also known as a material identifier or material index) is an attribute assigned to different parts or surfaces of a 3D model. It is used to define and differentiate between various materials or shaders applied to different portions of the model.
Let’s say you have a 3D model of a car consisting of separate objects, such as the body, windows, wheels, and headlights. To apply different materials to each component, you would assign a unique material ID to each part, as follows:
Material IDs are particularly useful when you want to apply complex materials or textures to specific regions of a 3D model, as they provide a convenient way to differentiate between different material assignments...
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