Unfortunately we don’t have a bezier/freeform mask tool. You could create another Kantan Mapper to make more masks or load masks made elsewhere using the Movie In TOP. If you want to use a mask to composite 2 images together, use the Matte TOP. You you want to use a mask on a single image, then a Multiply TOP will do the trick.
as Ben said you can use a mask made in Kantan by selecting it, saving it out and loading it back in via a MovieIn TOP. Also in the latest release of Kantan Mapper, you can have multiple mapping projects and composite the outputs of these any way you like. For this you only need 1 Kantan Mapper but use multiple projects which you create via the “New Mapping” button. The location of your new mapping project can be found in the Project Text field right below the “Save Mapping” button in the Kantan UI.
I’m sorry to ask you a question about what you wrote 10 years ago. Can you tell me how to control it in one Kantan mapper when using a number of projects?