VFX

Visiual Effects is often referred to as an acronym of VFX. Visual Effects can mean anything either optically or digitally introduced into the image that augments the image being captured in a standard manner by the on-set camera. 

Visual Effects can occur in the moment of shooting (but are often referred to as 'Special Effects' at that point) or more commonly, will be introduced into the imgagery in the post production process.