From the statements of the question, Lucas used computer and 3-D models.
The term model refers to a representation of reality. A model could serve the purpose of explanation or prediction.
We must note that the virtual reality is a computer package for creating 3D models and the modelling clay creates a tangible form of the 3D simulation hence Lucas used computer and 3-D models.
Learn more about models: https://brainly.com/question/14281845