Day 1 - Blocking with materials and some foliage blueprints
Day 2 - Adding some more foliage into the distance, doing a river spline to make the Environment feel more alive and adding some rocks
Days 3, 4 & 5 - Adding some particle systems for the smalle river waterfalls, giving some detail to the shadows and making a cliff in the distance to give some variety to the scene.
Last 2 days - Adding some Niagara particle systems to add falling leaves on the trees from the left, some flying birds on the distance and foggy clouds on top of the further mountains. Also correcting final details for better blending with the scene