Making entire scene fade to grayscale

Posted by Fibericon on Game Development See other posts from Game Development or by Fibericon
Published on 2012-03-19T06:42:54Z Indexed on 2012/03/19 10:19 UTC
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When the player loses all of their lives, I want the entire game screen to go grayscale, but not stop updating immediately. I'd also prefer it fade to grayscale instead of suddenly lose all color. Everything I've found so far is either about taking a screenshot and making it grayscale, or making a specific texture grayscale. Is there a way to change the entire playing field and all objects within to grayscale without iterating through everything?

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