How to do inverted UI masking in Unity

The UI "Mask" component in Unity doesn't allow to do reverse masking, but fear not, there's a simple solution.

[dabu]

For those who want the mask to move and the background not to move:
Set different Materials to the mask and the bg
Mask:8, 1, 2, 255, 255, 0;
BG:3, 2, 0, 0, 1, 15;
Then you can just put the Mask and BG the child of the canvas, and the mask needs to be upper
Finally, you can move the mask now

[Seekay]

Wow this is so much simpler than I thought, you'd think Unity would just provide these materials by default. Thanks!

[vleozin]

My man, just wanna let you know you are a LIFE SAVER. I've been like 4 hours or even more on this, because when I loaded new scenes through doors in my game, the other methods (with scripts to create new stencil materials) just broke and didn't create the black masked material for some unknown reason. I've been searching this whole time and, after a short break, picked up your video. Thanks!

[xyxdvhn]

Thank you very much! I've been looking for this all day!

[gorkemvids]

I was looking for this. Great tutorial. Thanks!

[jakubhronik]

Thanks you so much! I needed to do normal masking, but without parenting so that I could anchor to the correct element, and this finally did the trick!

[Davis_Bogdanovs]

Thanks a ton for this video, spent a few hours looking for this solution and luckily I stubled upon this!

[quantum]

Thanks mate, just what I was looking for!

[softwarecprogrammieren]

invert masking is what I need guys and dudes, thanks.

[Trasqual]

Hey man thanks alot! Also for anyone that want's the reverse effect, I changed stencil id on masked material to 1 (so both materials have same id) and it worked

[andywildsnake]

This is excellently simple and useful!
Such a great way of doing tricky things.
Thanks a lot!

[ElBuhoNincha]

Wow I was looking for a method that works. Thanks for the info

[tizianofranza]

Quite an awesome vid, it was exactly what I was looking for. Thanks a lot for sharing!

[pxupqki]

Thank you very much for the lesson, great video! I wish you success with your project :)

[necrokmo]

Awesome tutorial! This is really useful!

[abdoreda]

Thanks, this just magically worked. You are awesome :)

[NoPoint]

It actually freaking worked, thanks a lot <3

[syrupsprinkles]

Thank you for this, exactly what I needed!

[min-ofcv]

Thanks for the tutorial, I think inverted UI mask should be available in unity built-in components

[SpanielGames]

Do not set the alpha channel to 0 in the UiMask material settings and everything will work for those who do not