# Gradient masks inside movieclips?

**URL:** <https://forum.kirupa.com/t/gradient-masks-inside-movieclips/271224>\
**Category:** Uncategorized\
**Created:** [September 19, 2008, 9:34pm UTC](https://forum.kirupa.com/t/gradient-masks-inside-movieclips/271224 "2008-09-19T21:34:18Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![jibble](https://yyz1.discourse-cdn.com/flex011/user_avatar/forum.kirupa.com/jibble/32/2265_2.png) [@jibble](https://forum.kirupa.com/u/jibble)\
**Post date:** [September 19, 2008, 9:34pm UTC](https://forum.kirupa.com/t/gradient-masks-inside-movieclips/271224/1 "2008-09-19T21:34:18Z")

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why doesn’t it work? It works fine on the main timeline with the code below, but not inside a movieclip. Is there a workaround?

mask\_mc.cacheAsBitmap = true;  
image\_mc.cacheAsBitmap = true;  
image\_mc.setMask(“mask\_mc”);