Traditionally considered a very technical role, the Lighting TD or Lighter, also needs to have an eye for colour, tone, atmosphere and composition, an understanding of how light reflects on objects in nature and the real world determines how we perceive them.
A Matte Painter creates 2.5D elements for shots. He or she might create an asset like a sky, which is added to a sequence of shots and then potentially tweaked or painted on, at the shot level, to break up any repetition.
A modeller is someone who creates CG assets for a film production. A CG asset can be anything; a character, an object, a vehicle or an environment. There are several ways movies and TV shows rely on Modellers; set extensions, full CG environments, CG characters and digi-doubles are the main tasks.
Starting your journey as a Concept Artist is super exciting, but it's going to take time and a lot of effort. The journey is 100% achievable and deep down, you know it's right for you.
A Texture Artist is someone who adds layers of colour and texture to a CG asset to make it look realistic. Without them, CG assets and environments would just be a boring, uninteresting grey colour.