A compositor is responsible for ensuring that the visual elements of a project fit and flow together seamlessly. To do so, they take different assets, such as live action footage or digitally created images, and combine them into a cohesive frame, shot, or sequence.

Compositors rely on various techniques such as digital image manipulation or green screen/chroma key, to combine features and images. Care is often taken to maintain realism by utilizing lighting with consideration of desired environment effects, cameras, and cinematography.

Compositors are challenged to bring elements together in a way that communicates the proper message and maintains the fluidity of the experience. Compositors often have a good knowledge of photography, a technical aptitude to learn industry software, and the desire to collaborate with other creatives to meet deadlines. The Lumina assessment can help inform candidates of qualities they have within the job aspects that can be nurtured for the role.