Block height maps ignore player casted shadows from the sun in the deferred rendering technical preview when enabling subsurface scattering on that block.

Reproduce:

1. import a PBR shader pack with height maps and make a world with deferred rendering technical on.

2. Create or use a block with subsurface scattering enabled in the block texture_set.json and the sun will still affect the height map of that block even if the player is standing in front of it.

Observed: 

Block height map texture is still illuminated with a player shadow when standing on a block with subsurface scattering enabled.

Expected: 

Height map texture should be affected by player shadows, making it just as dark as the shadows from a block.