I've recently been trying to terraform a mountain area using snow layers. However, even in full sunlight, there are weird shadows cropping up making the sides of the blocks seem much darker.
These ugly dark patches are particularly noticable from a distance:
The only thing I've been able to work out so far is that it seems to be effected by solid blocks in the vacinity:
What's going on here and is there any way I can get rid of this unsightly artifact?