The built-in SmartMask plugin allows masking and cutting out parts of photos.
Attention! The effect is not available in the free version of AliveColors.
SmartMask lets users quickly and effortlessly create precise selections and isolate an object from the background.
The plugin works equally well with both soft and hard edges of a fragment. With just a few clicks, you can select objects with clearly drawn borders as well as with blurred, translucent edges.
The following features are available in the built-in SmartMask plugin:
Magic Brush 
. The tool helps you easily select complex objects. It works with color sets: it keeps some colors and deletes others. Fill both lists and draw with the brush along the borders of an object and over the background.
Learn more about the tool.
Magic Brush
Chroma Key. The mode allows you to quickly and precisely remove a monochrome background (usually green or blue). Learn more about the parameters.
(mouse over the image to see the original image)
Refine Edges. The mode allows editing edges of selections or cutout objects. It significantly improves the edges of the selection and make it softer and more natural. Learn more about the feature.
(mouse over the image to see the original image)
You can also try the AKVIS SmartMask AI software (available as a plugin and as a standalone program).