My shaders are also near completion. At this point, I feel that the tea and the plate still need some work, but I am pretty satisfied with everything else in the scene.
I am really happy with the jam on the toast. This was achieved simply by using a flattened cube on the toast, with an opacity map painted in Mari (featured below). I used a bercon noise for displacement, and a light pink refraction color for the shading. The specular model is similar to that of water.
I am looking forward to finishing this soon and moving on to my next project.