One Way Glass addon

This addon introduces a clever and creative building block that looks completely solid from one side, but is fully transparent from the other. I consider One Way Glass ideal for hidden rooms, spy bases, redstone traps, or secret observation points, all without ruining your build’s appearance.

 Credits: Flappyguy

How It Works

From the front, the block looks like standard dirt, stone, or any other material. From behind, you can see right through it — like one-way glass. The facing direction of the front panel can be manually set, giving you full control over how your illusion works.