Below is a simple digital matte painting I have put together using around 3/4 images. One version has a slight lighting change. I feel the version at the bottom is a little more realistic although the stronger shadows and warmer light in the top version looks more alive. I need to study colour harmony and lighting more to be able to make the right decisions when putting artwork together.
Warmer light and darker shadows above.
Cooler light and brighter shadow above.