MaTISSe is a software dedicated to free form shape Modeling and Animation through Interactive Sketching and Sculpting gestures. The goal is to provide a very intuitive way to create digital shapes, as easy to use for the general public as roughly sketching a shape or modeling it with a piece of clay. Our first prototype was developed in 2007, in the framework of a research contract with the company Axiatec 7.2 . It enables to progressively blend 3D shapes created - possibly at different scales and from different viewing angles - by painting their 2D projection. This prototype, written in C++ as an extension of the Ogre open-source library, heavily relies on our previous work on sketch-based modeling using skeletons and convolution surfaces 6.1.3 . Future extensions should include the combination of sketching with gestures related to clay sculpting, such as deforming a shape through pulling or pushing gestures.