Today was the last day we spent on this painting. I didn't get a chance to refine my demo painting very much but during the demonstration I talked about the basic principle behind moving from blocking-in to detail. The principle is "general to specific" or "big to small". Where you have one solid color from the blocking-in stage - break it into two colors and/or shapes. You need to develop the whole image incrementally. A common mistake is to jump from blocking-in straight to detail.
If you do find that your details don't look right or look like they are sitting on the surface of your canvas and not part of your image, then you have to be willing to paint over them and get the underlying structure right. This process of building up and breaking down is normal. You don't have to get it right the first time. I also suggested that if you find that you really love one part of your painting but the rest of the painting isn't quite right - paint over the part you love because chances are you are trying to protect it to the detriment of the painting as a whole.
You all did an excellent job. Many weren't finished by the end of class but I was very pleased with how well the paintings were developing. It turned out to be a bit trickier to paint than I had thought it would be.
Next week we are going to take a class to talk about color mixing. I will provide you with a new photograph to work from but we will use it as reference for some color mixing exercises and start the actual painting the following week. Come with a new surface to paint on and your usual painting supplies.