Issue description:

The more blocks are adjacent to the disk drive or the disk manipulator, the darker they get. As soon as at least 4 sides are covered, both RS blocks appear almost completely black.

Steps to reproduce:

1. Place disk drive / disk manipulator
2. Attach blocks on 3 or more sides

Version:

• Minecraft: 1.10.2
• Forge: 12.18.2.2120
• Refined Storage: 1.2.3

Does this issue occur on a server? - Yes

Screenshot:

http://i.imgur.com/q0Hs1op.png

This seems to appear because smooth lighting is on.

optifine issue