How to take picture with SSH?

I've seen people in the RS forums got a pic of themselves using a SSH, how is this possible?

 

You are able to construct a photo booth inside a dungeon and then take a picture there.

 

Oh man, lol.

With the Construction skill?

 

No, it's a little tent next to the sex changing mage in Falador.

 

Right click the ggs portal and choose replace.

 

Done, please close.

Thanks a lot