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I'm back with another question.

I've been working on a particle system, and I have a cube which outputs square particles from its volume without a normal movement value, then, I move the cube around (via keyframing).

My only problem is that particles usually achieve something similar to the right side of this image:

Rays

When what I really want to achieve is what's on the left.

Is there any way I could move the particles to form a point at the end?

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  • $\begingroup$ Help anyone? :/ $\endgroup$ – Cubit Jan 21 '16 at 19:28
  • $\begingroup$ Could you upload the .blend here blend-exchange.giantcowfilms.com ? $\endgroup$ – stacker Jan 21 '16 at 19:33
  • $\begingroup$ Hey, it's not that hard to just set up a cube that emits particles from its volume. I'm not uploading 5MB of something anyone can do. Besides, that's all my project is, a cube that emits cube particles from its volume. $\endgroup$ – Cubit Jan 21 '16 at 19:35
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    $\begingroup$ I tried this hours ago but couldn't find out how you setup the materials to fade out (particle node/lifetime) whether or not you emit objects (since cycles doesn't support halos) and so on. The basic scene with an animated cube shouldn't take 5mb. $\endgroup$ – stacker Jan 21 '16 at 19:40
  • $\begingroup$ xD the above image is not a render, just an example :) $\endgroup$ – Cubit Jan 21 '16 at 19:42
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You could emit objects from a vertex group of a ico sphere. Let the emitter follow a curve a force field could follow the emitter and attract all particles. The distance of the force field can be controlled by offset.

enter image description here

The fade out of the trail can be controlled by the particles age e.g.

(Note that the particle count has been lowered in the .blend) The age is not correctly calculated when using child particles.

enter image description here

enter image description here

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It looks to me that you need to apply Size-over-Age texture to your particle system.

Size is, apparently, the key influence, the velocity -- optional.enter image description here

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  • $\begingroup$ I'm not trying to make it smaller as it ages, I'm trying to curve it specifically. $\endgroup$ – Cubit Jan 24 '16 at 11:20
  • $\begingroup$ @Flaeon sorry I got your pictures wrong -- both of them kind of curved to me. If you don't want to reduce the size of the particles, just add physical forces to your scene to influence (curve) particles trajectories. You can control the influence to the specific type of force in the particle system config. $\endgroup$ – Andrey Lebedenko Jan 25 '16 at 23:46

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