Impressive amount of variation achieved from a fairly modest color assortment! Just curious, which colors were Utrecht brand? Any of them from the Cadmium-Free assortment?
I used to do that as well! Then my mentor showed me that he does front to back, and it helped me to gauge the values a bit more accurately. I found that when I started with the sky or distance everything was appearing a shade or two darker than how it looks in the landscape. Seems like different orders of operations work depending on what our tendencies or reasoning are!