1. First thoughts: Tried to type the painting style and artist. (Surreal and N-like, but lots of structure in the picture, things are composed in a very obvious structural ways, as a T would.)
2. Noticed composition first: How things are balanced, where the large areas of color were and how they interacted/supported each other, where the objects were related in comparison to each other, how all the elements fit together to create a balanced whole.
3. Consciously then began to focus on details, but had to choose to do it. Noticed the person sticking out of architecture on right, noticed the men talking, noticed what looked to be a steam engine in the background, and so forth. But details came last and were under conscious control, not first impression.