When returning from the Nether various places (user generated and world generated) have an excessive amount of shadows in places that shouldn't be.

Comparable to being in a perfectly dark room with no light sources.

Apparantely this only affects blocks that are not afected by light directly as blocks with torches or any other direct source of light are unnaffected (See screenshot)

My GPU is a Nvidia GTX 950 with 451.67 drivers (latest atm)