Layer Mode Transparency Effect Not Working on Particle Layer

[TC5]

I'm trying to apply a transparency on a CC Particle World solid layer using screen, dodge or burn layer modes etc, but the different modes do not remove the black background from the layer. Underneath the particle layer I have a tint filter layer and below that a solid fractal noise animation. moving the particle layer directly above the fractal noise layer doesn't change anything. I assume the layer mode should affect all layers below the particle layer?

The transparency adjustment in the Particle layer works, but that is not what I'm looking for. I want the black background to disappear so only the particles are visible.

Any idea what is going wrong here?

Thanks for any tips!

[Rick Gerard]

CC Particle world renders with an alpha channel (transparency) by default. You must be applying Particle World to footage and expect to see the footage. Add a Solid layer above the footage, add CC Particle world and you will be fine. 

If you really want to add CC Particle World to footage and see the footage, there is a Composite With Original checkbox in the Extras section. It's not recommended, but you can do it if you really want to.

[TC5]

Thanks for your reply. This is what I did, I created a solid layer and applied CC Particle World to it. The background is black. Where can I verify that alpha channel is enabled?

[Rick Gerard]

You don't have to do anything. Put another layer below it. If you cannot see the layer below then Composite With Original is checked in the Extras section. Spin down to check. You can also select the layer, press "uu" to reveal all modified properties in the timeline. If Composite With Original is checked it will show up in the timeline. You can also just enable the Transparency grid.

If none of that makes sense please open up the Learn workspace and go through the basic UI training. It will take you about 20 minutes to figure out how AE works.

[TC5]

Thanks for your help. Actually Composite with original was not checked, but when I checked it the black background disappeared as desired.

[OussK]

You can click the toggle transparency grid button to check your composition transparency/alpha channel

[TC5]

Thanks for your help. This button does remove the black background from the particle layer, but the fractal noise background on the bottom layer also disappears.

[Mylenium]

Chances are you have hardware acceleration issues by having too many accelerated effects in your stack vs. a weak or misconfigured graphicshardware. Start by setting things to software-only rendering modes.

Mylenium