This photo is a little old, as the painting is now nearly done! Here’s a photo of the third stage of the process, the second layer of tempera over an ochre ground:
In this phase of the process, the entire painting is covered by a semi-transparent yellow glaze and tempera is applied to the areas with the most light. Unlike the previous layer where tempera is used to establish form and textures, here it is used to show the light pattern. This is the phase where the painting really begins to take on dimensionality.
Coming up: the finished painting!