I've played a lot of Isaac, but I just now noticed that there are faint beams of light that come from the ceiling. Are these going to be updated in Rebirth? And are there any other visual effects that we can expect on a future Monday Isaac teaser?

we are working on that right now! i hope to be able to show a few shots of a near final graphics build at the end of the month.. by then 90% of the new graphics effects and small details/decorations should be in the game