Sources of 3D Models
There are two main sources of 3D models, those which are created within 3D software programs and those which are inputted into the computer through the use of photos, and are created with traditional artistry techniques such as sculpture with clay, or some of other 3D modeling form. These images are then scanned into the computer through the use of intricate scanning software that can detect the qualities of the image, and a model is created through the use of 3D modeling software programs. These two main sources of 3D models are the most popular methods of incorporating models into the software systems.
Procedural modeling is used to create plants, landscape and forms of architecture within the environment. This modeling is created through the use of database and line systems created within specific 3D model creation software. Algorithms are used to store data within the computer system, which essentially creates the formats needed to craft these models. Many times, when it is too cumbersome to create 3D models, these methods are used to create the model within a program.
There is a program referred to as a physics engine, which artists use to create behaviors of the models within a certain space. These types of engines are used to create anything from video games to movies. 3D modelers can create real-time models of the bodily movements required in these types of renderings through 3D models. It is important to have an understanding of basic principles of physics to understand how these physics engines work, and create models through the system.
Particle models are popularly created to craft 3D models which require the soft touches of the human body, or organic models. We need to use particle models, so the bodies do not become deformed throughout the 3D modeling process. Each type of 3D model has a specific method in which they work best to create, for this reason - experience in the field creates the most experience model creators.