# CPU Intensive Masking

**URL:** <https://forum.kirupa.com/t/cpu-intensive-masking/163528>\
**Category:** flash\
**Created:** [September 23, 2005, 2:58am UTC](https://forum.kirupa.com/t/cpu-intensive-masking/163528 "2005-09-23T02:58:45Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![Vexir](https://avatars.discourse-cdn.com/v4/letter/v/a183cd/32.png) [@Vexir](https://forum.kirupa.com/u/Vexir)\
**Post date:** [September 23, 2005, 2:58am UTC](https://forum.kirupa.com/t/cpu-intensive-masking/163528/1 "2005-09-23T02:58:45Z")

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[SIZE=1]So I’ve been wondering, if I take a big paragraph of text, slap it on top of a semi-transparent white rectangle, and then use masks to make it appear in the classic wavy motion, why does it lag so much? It certainly doesn’t lag when I just mask images.[/SIZE]