A polydrafter is proper if its cells conform to the polyiamond (triangle) grid, and extended if some do not.
Below I show how to make a minimal convex figure using copies of two tridrafters, at least one of each. These solutions are not necessarily unique, nor are their tilings. If you find a solution with fewer tiles, or solve an unsolved case, please write.
See also Convex Figures with Didrafter Pairs.
Each can form a convex shape with copies of two other tridrafters:
Last revised 2020-09-08.