A cinematographic technology that is created by the combination of Computer Graphics(CG) with the Special Effects (FX) by visualizing human-imagined images based on Computer Graphics (CG), or by recreating images in the real world, is called Visual Special Effects(VSFX) or Visual Effects(VFX).
In other words, the analog effects of all films at the shooting scene are Special Effects (FX), and all computer-based digital effects methods, or synthesis, can be defined as Visual Effects (VFX).