Thanks for the feedback, it was very insightful. I'm still learning how to manage the light, next time I will try make something in night time.

Nice scene! The light source is a bit inconsistent (compare the shadows on the stone wall with the shadows on the ground) and I think you could experiment with some larger clusters and fewer squiggly lines. For grass, for example, it might be better to have chunks of grass rather than individual blades with individual shadows.