HitFilm's compositing tools are hugely powerful, providing 2D and 3D layer-based compositing with an advanced particle simulator, live 3D object rendering, over180 built-in effects, planar tracking with a special version of mocha from Imagineer Systems and a unified 3D workspace.
The compositing tools work directly alongside the editor. Switching between your main edit and a fully CG visual effects shot is as simple as clicking the timeline tab. You can also bypass the editor entirely and use HitFilm solely as a compositor.
Composite shots are built using layers. Each layer contains a single asset (video, image, particle effect, 3D model etc) and can be heavily customized by applying transformation, drawing masks, adding effects and more.
Most customizable properties can also be keyframed, creating animation over time.