Teeth Whitening effects need help guys!

Help & Questions
1

I need help with teeth whitening effect. I used the face mask and texture it with white color. With an alpha only in the mouth area. As you can see in the video it is working fine. Now, the next thing I have to do is use the lips to occlude the excess white texture coming from the face mask. Unfortunately, as you can see in the video its not working as soon as I created the lips mesh. help please!

here is the video link: https://youtu.be/xffD0x7esNw?si=sqdrj6GRmnMKM-PN

2

You can check out the Makeup and Beauty template in the Studio to see how the lips are set up. You need to set up a lips node but disable the Color and Alpha write to create an occluder.

Let me know if you come across some issues.