Hi peeps. I pinged the devs so this patch can go into 2.72. So we have started discussing it. Let’s keep this momentum going. Current link is https://developer.blender.org/D355
Thanks.
I noticed that on toggling the particle off the sprite planes fade out but on toggling on they pop back very sharply. So that’s half the equation. So after having no luck with the opacity settings - due to stupidity or ignorance I gave up and approached it from a different side. I tried shrinking the sprite in and out - which works in Matinee but not in game. So the alternative I found was just to move the particle in and out of scene. Setting the particles move properties to interpolating.