This article will show you how to deal with scenes having too much noise or fireflies. Most of the time this happens when the scene setup is wrong. Let’s see them one by one and try finding the best ways to fix them.
Rendering artifacts may appear when a model has been moved away from the origin or its dimensions are out of this world. It may lead to unconnected/jagged edges and bad tessellation to the surface. The only way to overcome this is to either move the model near to the origin or scale it up/down to the physical size.