# Help with 3 masked mc under 1 mask

**URL:** <https://forum.kirupa.com/t/help-with-3-masked-mc-under-1-mask/266191>\
**Category:** flash\
**Created:** [July 17, 2008, 4:23am UTC](https://forum.kirupa.com/t/help-with-3-masked-mc-under-1-mask/266191 "2008-07-17T04:23:35Z")\
**Posts on this page:** 1\
**Page:** 1

<div class="post-metadata">

**Author:** ![doak](https://avatars.discourse-cdn.com/v4/letter/d/d26b3c/32.png) [@doak](https://forum.kirupa.com/u/doak)\
**Post date:** [July 17, 2008, 4:23am UTC](https://forum.kirupa.com/t/help-with-3-masked-mc-under-1-mask/266191/1 "2008-07-17T04:23:35Z")

</div>

I start by adding 4 movie clips to the stage.

```auto
_root.attachMovie("MC1","mc_1",this.getNextHighestDepth());
_root.attachMovie("MC2","mc_2",this.getNextHighestDepth());
_root.attachMovie("MC3","mc_3",this.getNextHighestDepth());
_root.attachMovie("MC4","mask",this.getNextHighestDepth());

```

I than want to mask the first 3 movie clips with the 4th one.

```auto
mc_1.setMask(mask);
mc_2.setMask(mask);
mc_3.setMask(mask);

```

However, only 2 of the 3 movie clips are masked.  
What’s happening and how can I mask all 3 in AS?