Overall your cloud shadow looks like a cloud filter from photoshop and not real clouds from a distance. In the near view your cloud shadow is simple not strong enough to make a impact to the scene.
@Cibo, right. It's a filter from Photoshop I usually do that with a very low opacity to break up the constant color of the ground and it works great, but with a hundred opacity it'll look like cloud shadows in game and I did this to have feedback and yes you are absolutely right. Think best is to lower the opacity to…