User blog comment:GrandMethuselah67/Lore Sheet: The People's Imperium of Neohumanity/@comment-4867780-20150810003841/@comment-26322734-20150810011958

They can't open another dimension at will (though a number of my U.R.H-aligned characters can, and beings like MAGNUMOPUS can also), but the whole quantum void thing isn't them opening up other dimensions, just creating areas devoid of particles and mining the quantum foam resulting.