Sometimes I refine a sketch in two dimensions before making a maquette. The following illustrates taking one such sketch through this process.
This is the original sketch for a sculpture I want to do in marble.
For this sculpture, I enlarged the sketch in foam board to the finished size I envisioned. This gave me a feeling for the mass of the forms and how they related to each other. I could then refine the sketch by changing the shape and position of the forms. I also had to keep in mind that this is a two dimensional representation of a three dimensional sculpture. To help create a three dimensional effect, I floated the foam board above the work surface and used an actual sphere.
I photographed the full size foam board sketch and made prints of the photos. I was then able make changes to the forms by drawing, cutting and pasting over the image.
The final step was to make a plaster maquette, which enabled me to make refinements as the two dimensional sketch became three dimensional. This ten inch maquette will be used as a guide to complete the 26 inch sculpture.