Enable or make a color set that includes a completely transparent color.
No rendering maybe?
That's because invisipant is no longer necessary. Just wrench, uncheck rendering, and hit send. No one has remade invisipant.
i said i need a faster way to make stuff invisible!
Stop being lazy. Turn off Rendering using the wrench menu and use the Copy checkbox over on the right so you don't have to do as much clicking for every brick.
its just easier to use paint