# How to achieve this effect?

**URL:** <https://forum.kirupa.com/t/how-to-achieve-this-effect/21103>\
**Category:** design\
**Created:** [May 17, 2003, 3:34am UTC](https://forum.kirupa.com/t/how-to-achieve-this-effect/21103 "2003-05-17T03:34:07Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![byis](https://avatars.discourse-cdn.com/v4/letter/b/5e9695/32.png) [@byis](https://forum.kirupa.com/u/byis)\
**Post date:** [May 17, 2003, 3:34am UTC](https://forum.kirupa.com/t/how-to-achieve-this-effect/21103/1 "2003-05-17T03:34:07Z")

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Im trying to find a tuturial or some input on how to achieve the effect found on [http://www.joelspeasmaker.com/main.html](http://www.joelspeasmaker.com/main.html) on the info page. The effect im talking about is the masking of the building. Thanks for any help!

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**Author:** ![system](https://canada1.discourse-cdn.com/flex011/uploads/kirupa/original/3X/6/2/621e5c11736f46532526e61be85940af4230f3e5.png) [@system](https://forum.kirupa.com/u/system)\
**Post date:** [May 17, 2003, 4:15am UTC](https://forum.kirupa.com/t/how-to-achieve-this-effect/21103/2 "2003-05-17T04:15:10Z")

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oh that’s easy!  
hehe  
I would do it by tracing the building fill it in, and use a mask and tweening.  
I hope that works.  
🙂

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**Author:** ![system](https://canada1.discourse-cdn.com/flex011/uploads/kirupa/original/3X/6/2/621e5c11736f46532526e61be85940af4230f3e5.png) [@system](https://forum.kirupa.com/u/system)\
**Post date:** [May 17, 2003, 7:17am UTC](https://forum.kirupa.com/t/how-to-achieve-this-effect/21103/3 "2003-05-17T07:17:18Z")

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Time to hit some masking tuturials =)