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Trails ...

Hello everyone,
I am trying to implement an effect where I create ghost images that sit behind any object that moves across the screen.
An effect that would turn a moving ball of light into a comet.

I've been playing with the accumulator, and looked at example compositions and have not been able to get anything satisfactory yet.
The closest thing is the "stix.qtz" example, but that is done by redrawing the primary image many times - not what I'm after.

Can anyone offer help?

Is there some GL code somewhere that'll do this?


Thanks
Jack

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References: 


 >OpenGL error on first rendering in -[QCOpenGLContext	willPushRenderState:] (From: Raphael Sebbe@Google <email@hidden>)


 >Re: OpenGL error on first rendering in -[QCOpenGLContext	willPushRenderState:] (From: Pierre-Olivier Latour <email@hidden>)


 >Re: OpenGL error on first rendering in -[QCOpenGLContext	willPushRenderState:] (From: "Raphael Sebbe" <email@hidden>)


 >Re: OpenGL error on first rendering in -[QCOpenGLContext	willPushRenderState:] (From: "Raphael Sebbe" <email@hidden>)


 >Re: OpenGL error on first rendering in -[QCOpenGLContext	willPushRenderState:] (From: Pierre-Olivier Latour <email@hidden>)























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