Press space to turn on the aura and B to turn it off use the sliders to customize it as you wish Press V to hide sliders press N to show them fullscreen for best effect
I accidentally created a hyperrealistic nebula while trying to create a portal to the underworld in the game I was making so I pulled up some different items in my backpack and modified 5 blocks and here you go <-- I assure you it looks better than on the unstarted page