Visual and Audio Effects
Visual Effects such as particle systems and sound effects such as Sound Cues play an important role in video games. They add a level of polish on top of systems, game mechanics, and even basic actions that make these elements more interesting or more pleasing to perform.
Let's start by understanding Visual Effects, followed by Audio Effects.
Visual Effects (VFX)
Visual Effects, in the context of Unreal Engine 4, are made up of what's called Particle Systems. Particle systems are made up of emitters, and emitters are comprised of modules. In these modules, you can control the appearance and behaviors of the emitter using materials, meshes, and mathematical modules. The end result can be anything from a fire torch, or snow falling, to rain, dust, and so on.
Note
You can learn more here: https://docs.unrealengine.com/en-US/Resources/Showcases/Effects/index.html.
Audio Effects (SFX)
Audio Effects, in the context of Unreal Engine 4...