In the game, portals and portal runes are highly bound. This means that if we do not have the portal rune in our backpack, an unavailable prompt will appear when using the portal. Therefore, you only need to obtain the portal runes at this time.
When we don't have the portal rune, it will prompt that the rune is unavailable.
In the game, the portal must use runes to activate it, and it cannot be used without runes. We can obtain runes by completing main quests, which is the most mainstream method.
In addition to the main quest, we can also get portal runes by looking for travelers to dig graves. However, this method does not provide a prompt and can only be found randomly during exploration.
In addition, if we are really short of runes, we can use the bugs in the game to get runes. The specific method can be found in the link above.
In No Man's Sky, portals and portal runes are highly bound. If we don't have the portal rune, we need to obtain it through various methods. Completing the main quest is the most mainstream method. You can also find travelers to dig graves and exploit game bugs to earn runes.