CG creator uses CG software
CG engineer makes CG software
Faculty of Arts have a class related to CG creator
Faculty of Information Sciences have a class related to CG engineer
Hiroshima City University: Faculty of Arts
Hiroshima City University: Faculty of Information Sciences
CG-ARTS Society: CG Creator Certification Test
CG-ARTS Society: CG Engineer Certification Test
Blender is one of a 3D CG software. It is used by CG creator. You model CG shape model manually. Artistic sense is required for modeling. Software automatically calculates the 2D rendering image.
OpenGL is one of a software library. It is used by CG engineer. You make a program to represent the shape and the motion of shape model. IT skill is required for CG programming. Although the library automatically calculates the 2D rendering image, you need to make the program, and it is not easy compared to an operation such as "image is automatically calculated after simply clicking a mouse."