So in my scene I have a large room where a player can walk around in and shoot. When the player walks into a certain spot in the room a few portals appear in the room and enemies walk out of the portals and attack the player. The one thing I'm missing is the portal itself. I'm trying to make something that looks like this: http://hotwheelsbattleforce5.wikia.com/wiki/File:Stormshock.jpg I'm not really sure how to go about doing this, and I need some help. Note: I do not have Unity Pro.