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.
Depth of Field is controlled by the f-number that can be found in Camera Settings. The default value is “Pinhole” and it totally removes the DOF effect from the scene. By selecting any other value, you can control DOF. By default, Camera settings have Auto-Focus enabled and this means that even if you set a custom focus distance, it will be overridden by auto-focus. Unchecking Auto-Focus will make Thea use the focus distance that was set by the user.