Umodeler

With UModeler, you can craft a static mesh asset as well as prototype a game level without any other external DCC tools. Moreover UModeler supports not only modeling with gizmos but also sketch-based modeling, which enables you to draw a 2D shape on a plane and make it 3D shape in intuitive ways. Any polygon is automatically triangulated to be fed to a rendering pipeline even though it has holes inside. It’ll save a lot of your time. UModeler consists of about 90 tools for modeling, which will make creating, transforming and editing your model a breeze in Unity.