[Elric Robichon]

Thanks a lot, my use of the switch was a little bit anarchic, I guess.
But that was only the first part of the problem : the other half is about Trapcode Particular 2, to generate a rain of bubbles with the Sprite option.
I scanned the whole manual, and couldn’t find anything related to that “keep transparency” switch. The only option is the simple “transfer Mode” that lets you choose only one blending mode at a time.
Thanks in advance, thanks again.