First Image is the rough sketch to laid down an environment look&feel. I made it in Photoshop with brush and some personnal photos for waterfall, could be even animated as these waterfalls are from a video I shoot with my camera. Second picture is a render from the model I did and rendered with After Effects / Element3D. Third image is the final render painted over in Photoshop using textures and custom brushes. All three images work was done in short delays and in a full nearly 4k resolution.