After the first rough pencil sketches I usually work on a color sketch a bit more elaborate. Not this time. I decided to build the 3D elements (Cheetah 3D) and compose them in Vue Studio where I played with settings for the sky to achieve something I liked for the image. So instead of a color sketch in Photoshop the key to build the palette for the rest of the image was the rendered sky in Vue.
The rendered elements are brought into Photoshop for composition. I used here the rule of thirds (see at the bottom) which is my favourite. I frequently use this one for compositions that include multiple elements, symmetrical compositions for portrait or simpler images and the golden ratio for scenes that include lots of movement. This is not a rule though, things change depending on the image