# Filter question with z order

**URL:** https://forum.kirupa.com/t/filter-question-with-z-order/286812
**Category:** Uncategorized
**Created:** [April 21, 2009, 12:01pm UTC](https://forum.kirupa.com/t/filter-question-with-z-order/286812 "2009-04-21T12:01:33Z")
**Posts on this page:** 1
**Page:** 1

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### Author: ![unhitched](https://avatars.discourse-cdn.com/v4/letter/u/b38774/32.png) [@unhitched](https://forum.kirupa.com/u/unhitched)
#### Post date: [April 21, 2009, 12:01pm UTC](https://forum.kirupa.com/t/filter-question-with-z-order/286812/1 "2009-04-21T12:01:33Z")

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I have an image with a translucent rectangle sitting over it (white rectangle with alpha = 0.5)

I’d like to apply a filter to the rectangle and have it affect the image below it.

For example, apply a blur to the rectangle and see the part of the image below the rectangle get blurred.

Any ideas how I might achieve this?

cheers