Trapcode Particle to appear when only on white colour
About 8 years ago I created a project where I got Trapcode star particles to appear only when they were over a light colour, in this case moving light grey morse code text on black background. See jpeg. If you look closely the stars only appear over the morse code. I have to work on the project again, and of course as Trapcode has been updated, my settings have been lost.
I cannot remember how I achieved that then. <font face=”inherit”>I’ve tried almost every conceivable solution in current edition, the whole gambit of modes etc, I dont think I was into expressions then, but I’m failing to replicate this again, I’m in </font>despair!<font face=”inherit”> </font>
Can anyone shed light on how I may be able to do this in current edition of Particular please?
I would be very grateful!
Thanks in advance