Answer
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Properties that might be incorporated into a 3D graphics model include geometric information like shape, size, and orientation. Material properties such as color, texture, and reflectivity are essential for realistic rendering. Additionally, spatial properties like position and movement contribute to dynamic scenes.
On the other hand, internal characteristics like the object's molecular structure or microscopic details are typically not represented in a 3D graphics model. These details are often beyond the scope of what is visually perceptible in the intended graphics scene and could lead to unnecessary computational complexity.