What's Multidimensional Baby's tears effect?

The Multidimensional Baby item is described in this video:

As shown in the video, the Multidimensional Baby familiar doubles the projectiles you and your other helpers fire, along with giving them the flashing black and white effect. Contrary to what's said in the video, you don't necessarily need to be in contact with the familiar to make this effect work. While that's one way to get the effect, any projectiles that pass through the familiar will also gain this effect. The Multidimensional Baby will follow your movements, but with a delay of a few seconds, making it difficult to use if you need to move around a lot.

Other than doubling the number of projectiles you fire, it doesn't add any special effects onto them.

According to PlatinumGod:

Multidimensional Baby is a familiar baby that will follow your movement pattern on a 3 second delay. Tears that pass through the baby will double up and increase in damage while flashing black & white.

From my observation this familiar doesn't shoot on its own. Instead it converts any Isaac's tear passing its body to 2 black/white tears.

Didn't found those tears any special though.