Some of the tips while filming for VFX

1. Using Yellow Markers on Green :- On green screen - use yellow markers and separate the components separately for tracking and keying.Note that if you use the green channel only, the markers are easily keyed and you avoid time consuming marker removal. The red channel provides a great high contrast image for tracking.
2. Marker Placement for 3D Tracks:- If you are filming a greenscreen, it is important to not just have markers on the same flat greenscreen background, markers need to be at different distances from the camera for a good 3D solution.
3. Keep the Greenscreen in Focus When it Makes Sense:- For compositors, this is a pretty obvious tip. Sure, there are times when this isn't a steadfast rule and the lens choice requires a soft-focus background. But we mention it here because you might be surprised how many times this isn't simply basic procedure on set. It never hurts to mention it on a technical call, especially if you're not going to be on set for the supervision. The first time you get back some footage with all the tracking marks way out of focus and you don't need it that way, you'll remember to mention this.