Mods/The Aether/Aether Portal Block
Aether Portal blocks are generated when a portal is formed, standing in them will teleport the player from The Overworld to the Aether and vice versa. However, they disappear when a block is placed next to it. In creative mode you can break this block and it will play the glass breaking sound. The portal animated texture is procedurally generated, like water or lava. The Aether Portal block looks like a yellowish recolor of the Nether Portal block but with the same animation.