Issue Description:

Shadow Rendering think that you placed a Full Block instead of a Stair

Related Mods:
CTM-MC1.10.2-0.2.1.21
OptiFine_1.10.2_HD_U_E3
Texturepack : Soartex

What you expected to happen:

Should look like the cobble stone stair.

Steps to reproduce:

1. Paint a cobblestone stair with something else
2. Place a block
3. Place the Stair with no Lightsource directly infront

Affected Versions (Do not use "latest"):

• EnderIO: EnderIO-1.10.2-3.1.193
• EnderCore: EnderCore-1.10.2-0.4.1.66-beta
• Minecraft: 1.10.2
• Forge: 1.10.2-forge1.10.2-12.18.3.2422