Custom Parameter Example

Hi gang;

In the plugin included with After Effects titled CC_Particle_World, the opacity map parameter is a custom parameter where one can 'draw' the opacity over time. I've included a screengrab of it below:

Are there any examples that would show how to create something like this? I know the SDK comes with some UI examples like CCU, ColorGrid and Custom_ECW_UI but I can't even successfully compile these so I can't check them out (I get persistent errors).

I have to implement something similar so I was hoping there was some existing sample code that showed how to do something similar to this, or perhaps someone has those UI examples compiled they could send if any of them shows a similar effect? Then at least I'd know which SDK example to study.

Any info / help would be appreciated.

Thanks,

-Richard