In the game industry, while there are many different roles in the process of developing games, there are two main roles in level creation, the environment artist and the level designer.

An environment artist is the person who builds the assets to go into the environment. They use tools such as 3ds Max or Maya to create the model and then use other tools like Photoshop to create textures and normal maps.

The level designer is responsible for assembling the assets that an environment artist creates in an environment for players to enjoy. They design the gameplay elements, create the scripted events, and test the gameplay. Typically, a level designer will create environments through a combination of scripting and use some tools that may be in development. In our case, that tool is Unity.