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Activity Forums Adobe After Effects Trapcode Particular blocked by 3d Object?

  • Trapcode Particular blocked by 3d Object?

    Posted by Nicolas Hansen on August 13, 2008 at 5:25 pm

    This is weird, not sure why this is happening.
    I have a Trapcode Particular layer emitting particles.
    I have a PNG file set as a 3D Layer. The particles are being emitted just behind the 3D layer (so they burst out from behind the layer)

    The weird thing: All the particles are being “blocked” by the 3D layer. I will rotate my camera around, and in theory the 3D layer should be in the center of the “orb” of particles, but no particles show up in front of the 3D layer.
    It’s not even as if the particles hit the layer and stopped moving outward.
    I hope I am explaining this right, but is this some sort of bug? How do I get around this? I want to have a 3D layer inside the orb of particles, but nothing is showing on top of the 3D layer. it’s really weird…
    Any help would be great, thank you.

    Mark O’connell replied 17 years, 8 months ago 3 Members · 2 Replies
  • 2 Replies
  • Bobby Shepherd

    August 13, 2008 at 9:50 pm

    Ah, my biggest gripe with Particular. This plugin is a 2D+ plugin, not a 3D plugin. Therefore, even though it can respect your camera and motion blur settings, it cannot respect lights or 3D layers in a true way. It’s more of an emulation setup, which is why you CAN set an obscuration layer. So….what to do?

    The first, more front-end, solution I’ve come up with is the tedious process of duplicating the Particular layer, sandwiching the 3D layer between these, and then adjusting the Near and Far Vanish parameters under Visibility. This should be fine if the distance between your camera and your object stays consistent. If not, then you’ll have to finagle a “lookAt” expression to gauge the distance between camera and object and then to set the parameters based on that.

    You can also finalize the rest of your animation and then duplicate the Particular layer, duplicate the Object, set Object 1 to matte Particular layer, then set Object 2 to inversely matte Particular layer 2.

    It’s a very powerful plugin –one of my faves–, but it does have its limitations.

    Hope this helps,
    -B

  • Mark O’connell

    August 13, 2008 at 11:37 pm

    Particular needs to be applied to a 2D layer. It’s not true 3D. If you have a 3D layer above the particle layer in the timeline it will block your view of the particles, just as it would block your view of any 2D layer below it.

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