This project originated in an investigation into the hybridisation of digital and handcraft processes in the generation of form. It quickly departed from that, when I realised that the underlying issue was that of relationship and transition between two and three dimensions. It became clear that this was a lens through which my previous practice in both vessel making and sculpture could be usefully viewed and understood and thus it presented rich potential for further research. The initial investigation gave me some useful insight into the value of CAD software for the rigorous language of its menus as guides in analysing the handmade, and also the limitations of its output in delivering the nuance of materiality. It continues to inform my method and thinking about process. I am exploring the potential for a cyclical and reciprocal relationship between drawing and making, line and form, plane and solid. This embraces exploration of methods for generating a three dimensional solid from a two dimensional image, and then revealing formal or aesthetic qualities of that solid through a two dimensional intervention or analysis, such as that derived from cross section, silhouette or shadow. Consideration of cast shadows as an example of a three to two dimensional transition have led me to focus on the penumbra, the boundary between light and shade. I am doing this by attempting to realise its material equivalent, the boundary between matter and space. The use of cross section as a method of construction of and intervention in form is a key method in the physical manifestation of this phenomenon. The boundary of clay, the difference between its presence and absence, is finite and abrupt. The boundary between the light and shade, however, appears infinite in its gradation and thus is inherently indistinct. Thus the notion of transition from the project title becomes crucial. Through exploring transitions between dimensions and between presence and absence I aim to capture ephemeral and fugitive visual qualities in the material object.