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 the attached resource pack (it has a on and off mode in pack settings for comparison).

2. Enable subsurface scattering in the pack settings (on by default) place a grass block and set the time to day, you will see that the height maps ignore player shadows from the sun when the block has subsurface scattering enabled.

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.