Adobe Photoshop is a graphics editing program developed and published by Adobe Systems Incorporated. wikipedia.org

ZBrush is a digital sculpting tool that combines 3D/2.5D modeling, texturing and painting. It uses a proprietary "pixol" technology (see below) which stores lighting, color, material, and depth information for all objects on the screen. wikipedia.org

3D modeling (also known as meshing) is the process of developing a mathematical representation of any three-dimensional surface of object (either inanimate or living) via specialized software. wikipedia.org

Character creation (also character generation or character design) is the process of defining a game character or other character. Typically, a character's individual strengths and weaknesses are represented by a set of statistics. Games with a largely fictional setting may include traits such as

Skeletal animation is a technique in computer animation in which a character is represented in two parts: a surface representation used to draw the character and a hierarchical set of interconnected bones used to animate the mesh. wikipedia.org

Computer graphics are graphics created using computers and the representation of image data by a computer specifically with help from specialized graphic hardware and software. wikipedia.org

Computer animation is the process used for generating animated images by using computer graphics. wikipedia.org

Character animation is a specialized area of the animation process, which involves bringing animated characters to life. wikipedia.org

Substance Painter is a 3D painting software allowing users to texture, render and share their work.