# How can I do this

**URL:** <https://forum.kirupa.com/t/how-can-i-do-this/178872>\
**Category:** Uncategorized\
**Created:** [February 14, 2006, 11:17pm UTC](https://forum.kirupa.com/t/how-can-i-do-this/178872 "2006-02-14T23:17:41Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![halanis](https://avatars.discourse-cdn.com/v4/letter/h/0ea827/32.png) [@halanis](https://forum.kirupa.com/u/halanis)\
**Post date:** [February 14, 2006, 11:17pm UTC](https://forum.kirupa.com/t/how-can-i-do-this/178872/1 "2006-02-14T23:17:41Z")

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Hello all.

Well this is what I want to to:  
I want to iluminate an object that you can’t see untill a “light” iluminates it.

On the attachment, you can see the blue circle all the time, but how can I make it invisible and just show it whenever is iluminated?

Please help

Halanis