# Mask effect or bitmap usage?

**URL:** <https://forum.kirupa.com/t/mask-effect-or-bitmap-usage/250525>\
**Category:** Uncategorized\
**Created:** [January 30, 2008, 9:03am UTC](https://forum.kirupa.com/t/mask-effect-or-bitmap-usage/250525 "2008-01-30T09:03:03Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![rafnews](https://avatars.discourse-cdn.com/v4/letter/r/f17d59/32.png) [@rafnews](https://forum.kirupa.com/u/rafnews)\
**Post date:** [January 30, 2008, 9:03am UTC](https://forum.kirupa.com/t/mask-effect-or-bitmap-usage/250525/1 "2008-01-30T09:03:03Z")

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Hi,

i’ve seen on internet several website where a photo is divided into small square (at least virtually) and each square is after displayed as following to reconstruct the whole photo.

- each square is place on stage on a particular place (same location as on the photo)
- each square randomly are selected and are displayed from size (0,0) to it final size (so a smal part of photo, for example 50 x 50 px).

this effect is really nice but i do not know how to do it in AS3, because :

- first : each square seem to be only added to the photo (the phot it self seems to not be divided into little square).
- second : each square start from 0 to reach their final size (but randomly and smoothly)

could anyone help me ?  
is there any tutorial for that ?  
do they use mask for that effect ?

thx.

A.