What is Fillet?
Fillet is a term used in 3D visualization to describe the process of creating smooth, curved transitions between two surfaces. This can be done using various software programs or plugins, but the result is always the same: a more realistic and organic-looking model.
There are two main reasons why you would want to use fillet on your 3D models. The first is for aesthetic purposes; as mentioned above, filleted models simply look more realistic and organic than their non-filleted counterparts. This can be especially important if you’re working on a project that will be seen by many people, such as an architectural rendering or a product visualization.