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Bullet Trail? Displacement map problem?

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Paul FishermanBullet Trail? Displacement map problem?
by on Jan 19, 2016 at 9:10:44 pm

I recently saw a tutorial to create a bullet trail effect as seen in the Matrix and other films, using Trapcode Particular. I created the trail with Particular and precomposed it in After Effects, and precomposed my base footage too. I then applied the Displacement Map to my footage layer and selected the source to the Solid with Particular on it. For some reason, when I adjust the horizontal displacement or vertical, it moved my footage up and down instead of the Particular. What did I do wrong? Link to tutorial:



. Tut for effect starts around 8:50.


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Michael SzalapskiRe: Bullet Trail? Displacement map problem?
by on Jan 19, 2016 at 9:49:35 pm

Effects that rely on other layers look at the raw layer data. It does not look at effects applied to that layer. What you have to do is precompose your layer with Particular and make sure you move all attributes into the new composition.

- The Great Szalam
(The 'Great' stands for 'Not So Great, in fact, Extremely Humble')

No trees were harmed in the creation of this message, but several thousand electrons were mildly inconvenienced.


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Paul FishermanRe: Bullet Trail? Displacement map problem?
by on Jan 19, 2016 at 11:30:56 pm

So basically take my solid that has the TrapCode Particular effect applied to it, precompose it and select move attributes into the new comp? Alright, I will get back to you once I have done that.


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Paul FishermanRe: Bullet Trail? Displacement map problem?
by on Jan 19, 2016 at 11:52:28 pm

Wait a second.....I did move all attributes into the new composition.......now im really confused. Okay, here are the steps I took:

1. 3D camera track footage
2. Add bullets from cinema 4d
3. Create new solid
4. Apply particular and adjust jeyframes accordingly
5. Precompose solid with particular (moved attributes into nee comp)
6. Precomposed base footage (did not precompose the track data or c4d data) (moved attribute into new comp)
7 apply displacement map onto solid precomp


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Michael SzalapskiRe: Bullet Trail? Displacement map problem?
by on Jan 20, 2016 at 8:40:36 pm

If you've got camera data, you'll need to copy your camera into the precoomp too.

- The Great Szalam
(The 'Great' stands for 'Not So Great, in fact, Extremely Humble')

No trees were harmed in the creation of this message, but several thousand electrons were mildly inconvenienced.


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Paul FishermanRe: Bullet Trail? Displacement map problem?
by on Jan 21, 2016 at 12:30:52 pm

I'm so sorry, I just realized that yesterday after watching a different, but similar tutorial. But now itnlooks great, so thanks for your help!

"Why, Mr. Anderson? Why, why, why? Why do you do it? Why get up? Why keep fighting? Do you believe you're fighting for something? For more than your survival? Can you tell me what it is? Do you even know? Is it freedom? Or truth? Perhaps peace? Could it be for love? Illusions, Mr. Anderson. Vagaries of perception. Temporary constructs of a feeble human intellect trying desperately to justify an existence that is without meaning or purpose. And all of them as artificial as the Matrix itself, although only a human mind could invent something as insipid as love. You must be able to see it, Mr. Anderson. You must know it by now. You can't win. It's pointless to keep fighting. Why, Mr. Anderson? Why? Why do you persist?"


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Michael SzalapskiRe: Bullet Trail? Displacement map problem?
by on Jan 21, 2016 at 4:04:26 pm

Glad to help. :)

- The Great Szalam
(The 'Great' stands for 'Not So Great, in fact, Extremely Humble')

No trees were harmed in the creation of this message, but several thousand electrons were mildly inconvenienced.


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Paul FishermanRe: Bullet Trail? Displacement map problem?
by on Jan 20, 2016 at 12:30:54 pm

Wait a second.....I did move all attributes into the new composition.......now im really confused. Okay, here are the steps I took:

1. 3D camera track footage
2. Add bullets from cinema 4d
3. Create new solid
4. APPLY particular and adjust jeyframes accordingly


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