I am working on this painting that was originally just blue, but I am trying to add some warmth and broaden the value range. The challenge is working with clear and opaque colors and having them work well together. In the shadows, I can use deep red, sap green, and paynes grey in transparent layers. On the high lights, I use white, and even with a transparent medium it still makes an opaque layer. I keep going back and forth...I think overall I still want a warmer feel.
See the beginning here.