# Circle turns into polygon

**URL:** <https://forum.kirupa.com/t/circle-turns-into-polygon/182338>\
**Category:** flash\
**Created:** [March 17, 2006, 7:24am UTC](https://forum.kirupa.com/t/circle-turns-into-polygon/182338 "2006-03-17T07:24:16Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![jmreyes](https://avatars.discourse-cdn.com/v4/letter/j/df788c/32.png) [@jmreyes](https://forum.kirupa.com/u/jmreyes)\
**Post date:** [March 17, 2006, 7:24am UTC](https://forum.kirupa.com/t/circle-turns-into-polygon/182338/1 "2006-03-17T07:24:16Z")

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Hey guys,

Need some help here…  
Probably a quick one…

I have this rectangle centered on the stage.  
I made a circle mask tween above the rectangle. 1X1 pixel on first frame to big enough to show the whole rectangle on the last frame.

The thing is… When i play the animation by pressing Enter while on the workspace. It looks perfectly ok.

But when i preview it using text movie or with the exported movie. the circle mask seems to be a polygon.

Heres a print screen of the mask animation probably halfway through…

![](http://img223.imageshack.us/img223/599/untitled10lx.jpg)

Why is this happening?..

Anybody with an explanation and/or solution about this?

Thanks is advance.