Am 13.05.2010 23:25, schrieb tensor:

> I am doing a complex animation where certain parts fade in and out. The parts
> are made of unions of components with each components having its own
> texture/pigment. I would like to just fade the transparency for the whole union.
> Is there a way to do this at the union level or do I need to embed a
> transparency clock down to each component.

The latter.

You'll probably also get unexpected behavior regarding hidden surfaces 
(depending on what you really want to achieve), as they will become 
partially visible while the object fades out.

Maybe the focal blur mechanism of MegaPOV could be misused to achieve 
what you want.

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