iphone - How can I fade a View with a CAEAGLLayer -

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i'm looking way change alpha value of view caeagllayer. setting self.alpha doesn't work, think there must concept here don't understand. app i'm building has opengl layer on live footage iphone/ipod camera, , i'd fade in , out. i've tried setting caeagllayer's opaque , opacity value, won't work. thoughts may have.

i trying similar, i.e. have background of caeagllayer transparent, can draw on photo. have managed fade whole thing in , out setting alpha value on layer in layout editor of nib, might work you, not quite effect want. want transparent background , there discussion of how achieve here:

http://www.iphonedevsdk.com/forum/iphone-sdk-development/20081-merging-content-uiimageview-eaglview.html

although haven't managed describe working yet ... :-(


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