Vertus Fluid Mask 3 is a high-end masking software that functions both as a standalone application and a plug-in for Adobe Photoshop. It mimics the way the human eye and brain see objects by identifying edges, textures, and colors to create an "intelligent" map of your image.
Seamless integration as a filter for Adobe Photoshop (CC and older versions). Vertus Fluid Mask 3 v3.2.4
You can adjust how many pixels the software analyzes around a transition zone. A narrow edge (1-3px) is for hard lines (a car against a wall). A wide edge (20-30px) is for fur or flyaway hair. Vertus Fluid Mask 3 is a high-end masking