- in this lighting scenario (early evening?) the shadows are blue-ish or grey-ish, except on skin.
- top planes receive skylight and get colder, planes that face down receive warm bounce light from the ground. The closer to the light-source, the stronger the effect.
- brown rock also has desaturated blue shadows
- sandy beach can be brighter that the sky or the clouds
- gaussian blur filter is a quick easy way to get the foreground out of focus
- there is a gradient in the sky from green-blue to a darker blue. The green-blue is closer to the sun
- the shadow on the beach is violet-grey but has a saturated edge
- it helps to think of everything in terms of 3D geometry and not in terms of thinking of the object itself (i.e. arm, leg, tree-trunk). Easier said than done, though.
Hope it helps. :)