Glassential Mod

Glassential is a mod that adds new special types of glass to your game, such as 

• Luminous Glass -  emits light
• Redstone Glass -  emits a strong redstone signal. 
• Dark Glass - prevents light from escaping (which can be good for mob farms and is similar to the one in Dark Utils)
• Ghostly glass - lets mobs pass-through
• Ethereal Glass - like Ghostly but for players
• And More

There are also Reverse Ethereal Glass and Tinted glasses, which have the properties of both their original glass type and the tinted glass. These glasses provide new ways to make your game more interesting and fun. It is compatible with ConnectedTexturesMod so you can have connected textures.