# Updating polygon opacity every trial not working on pavlovia

**URL:** <https://discourse.psychopy.org/t/updating-polygon-opacity-every-trial-not-working-on-pavlovia/19469>\
**Category:** Online experiments\
**Tags:** pavlovia\
**Created:** [January 8, 2021, 6:16am UTC](https://discourse.psychopy.org/t/updating-polygon-opacity-every-trial-not-working-on-pavlovia/19469 "2021-01-08T06:16:31Z")\
**Posts on this page:** 1\
**Showing post:** 2

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**Author:** ![tandy](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.psychopy.org/tandy/32/9246_2.png) [@tandy](https://discourse.psychopy.org/u/tandy)\
**Post date:** [January 8, 2021, 10:07am UTC](https://discourse.psychopy.org/t/updating-polygon-opacity-every-trial-not-working-on-pavlovia/19469/2 "2021-01-08T10:07:52Z")

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Unfortunatly opacity non changing properly online is a known issue (e.g. see this discussion [Change opacity when I click on a rectangle](https://discourse.psychopy.org/t/change-opacity-when-i-click-on-a-rectangle/19235)).

I suggest you find another solution, for example changing the color instead of the opacity.

tandy

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