This next mod for Minecraft adds invisible blocks, and when you want to build some secret warehouse or an invisible house, you can always select the desired block in your inventory, but to see these blocks you will need to wear special glasses, which are also added with addition to this mod.

Installation instructions for the mod for Minecraft 1.7.10:

1. Install Minecraft Forge

2. Download the archive with the mod

3. Open the downloaded archive and unpack it into the .minecraft / mods folder