Light on textures

[Christy]

Im looking around now, but hopefully someone can answer sooner.

I have a room that from the inside has rock walls all around and on the outside its glass so the people on the outside can see in. I want it dark on the inside but since its glass on the outside the light still comes through. anyway to remedy this?

 

[Rogue Sniper]

make a block by the glass thats the texture of Block Light, this will stop 95% of the light. Since Source isnt perfect a little bit of light will sneak through, well for when Id use it then, it would.