Portals are made by left and right clicking, portals cannot be made on transparent blocks, if an invalid location is selected for a portal there is a small particle effect similar to the game Portal.
If you don’t have enough with the mod and want to improve the immersion with this mod further, remember that you can download Portal Companion Droid’s skin and even use textures based on the game Portal thanks to the Precisely Portal texture pack. This mod adds a few different items most of which are from the game Portal. The mod does not, however, include chambers from Portal. Thus, with this mod installed, you will be able to take advantage of Portal features, such as traveling great distances in an instant, thanks to the portal guns.
Portal Gun is a mod that adds various blocks, objects, and articles from the Portal game to your Minecraft worlds.
