# Anyone know how to do this?

**URL:** <https://forum.kirupa.com/t/anyone-know-how-to-do-this/159183>\
**Category:** Uncategorized\
**Created:** [August 15, 2005, 4:53pm UTC](https://forum.kirupa.com/t/anyone-know-how-to-do-this/159183 "2005-08-15T16:53:55Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![Henry](https://avatars.discourse-cdn.com/v4/letter/h/df705f/32.png) [@Henry](https://forum.kirupa.com/u/Henry)\
**Post date:** [August 15, 2005, 4:53pm UTC](https://forum.kirupa.com/t/anyone-know-how-to-do-this/159183/1 "2005-08-15T16:53:55Z")

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Seen this masking/transition effect on a few things now…  
Very cool, found a vague tutorial on the subject but couldnt get the thing to work

heres what i want to do…  
[http://www.lomography.com/greenspace/](http://www.lomography.com/greenspace/)

heres a tutorial…  
[http://www.actionscript.org/tutorials/advanced/Dynamic\_masking\_using\_the\_drawing\_API\_II/index2.shtml](http://www.actionscript.org/tutorials/advanced/Dynamic_masking_using_the_drawing_API_II/index2.shtml)

if you go to the bottom you can see the effect

anone know of a better tutorial, or how to ge this to work…

thanks in advance