# Need help with masks

**URL:** <https://forum.kirupa.com/t/need-help-with-masks/234590>\
**Category:** Uncategorized\
**Created:** [August 3, 2007, 3:24pm UTC](https://forum.kirupa.com/t/need-help-with-masks/234590 "2007-08-03T15:24:59Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![joemurray](https://avatars.discourse-cdn.com/v4/letter/j/5f8ce5/32.png) [@joemurray](https://forum.kirupa.com/u/joemurray)\
**Post date:** [August 3, 2007, 3:24pm UTC](https://forum.kirupa.com/t/need-help-with-masks/234590/1 "2007-08-03T15:24:59Z")

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Hey everyone. I’m hoping that this will be a somewhat easy thing to do. I’m making this little interactive piece for an extermination company and I need to have 2 images on the stage. One is a normal image, and underneath is an identical infrared image showing mold damage. I need to create a draggable circle that will reveal the mold damage within the circle (like a microscope). I’m assuming that this effect is done with masking and I’ve been messing around with it all morning. Can anyone help me get headed in the right direction?