Im trying to do a tutorial that uses CC particle world, but when i add the effect, and do the exact steps, the effect isn't showing up... specifically im using the lens convex particle, and nothings showing up.
The lens convex particle type gets it's colour value from the layer you place the effect on. So if you've created a black solid and applied that particle type to it, you won't see it against a black background. Try changing your solid colour to white.
If that's not the problem then if you can give me some more details about the steps you're taking, I'll try my best to help.