Track the Light Source
FCPX Light Rays features a brand new trackable mask tool that allows you to outline your light source and track it's movement so that the mask stays in place. This ensures that the source of your volumetric lighting is contained within the mask. FCPX Light Rays features a variety of tracking options and the even the ability to keyframe mask positions and add automatically animate between keyframes.
Adjust the Light
After adjusting the direction and length of light rays using the intuitive on-screen control set-up you can find many more attributes in the Light Controls section. Adjust the color of the light, the amount of glow, the diffusion amount/point and the prism amount. It's easier than ever to fine tune your light.
Hide Portions from the Light
FCPX Light Rays features additional presets that allow you to mask out a portion of your clip from receiving any light. You can also soften the mask for a more natural light falloff look.