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Particle system scaling issue

I'm having issues with scaling in particle systems. I've made a flame thrower particle system, basically, using spheres and stretching them as needed, which resulted in this;

Image https://drive.google.com/file/d/0BxJkHJNJnNIpZlNEWXBnNWtiTjg/view?usp=sharing

however, it only works when pointed along the X axis. if i turn it, it looks like this;

Image https://drive.google.com/file/d/0BxJkHJNJnNIpa2tDejc3eHhRTDQ/view?usp=sharing

It seems the scale for the meshes doesn't rotate with the actor. I was wondering if there was a fix, or at least a workaround for this.

Thanks in advance for anyone who can help, and in case it matters, here's the modules used in the particle system.

image https://drive.google.com/file/d/0BxJkHJNJnNIpaEFlMjN2Q1FOQW8/view?usp=sharing

Product Version: UE 4.7
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asked Jul 11 '15 at 12:07 AM in Using UE4

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Traviesimo
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Hi Traviesimo -

You will need to go into the Mesh Type Module in your Emitter and set a locked axis for the mesh, so it knows to not rotate about that particular axis.

Thank You

Eric Ketchum

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answered Aug 05 '15 at 06:27 PM

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Lovecraft_K ♦♦ STAFF
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avatar image iLegacy Aug 14 '17 at 04:26 PM

SOLVED:

  1. Mesh must Point Z in 3Ds Max (aligned with the ground)

  2. Required Node: Screen Alignment: PSA Type Specific

  3. Mesh Data: Face Camera with Roll or Spin / Axis Lock Option: Z / [X] Camera Facing / Velocity Aligned (any of the 4 options work) / Apply Particle Rotation as Spin

I have another issue regarding mesh particles and scaling.

Here you see my little circle-meshes. They work well until I SCALE the Particle System. All the particles are now squashed:

Options (since the mesh is already aligned horizontally, i don´t need any lock-axis or camera-facing options):

Mesh Data:

  • Mesh Alignment: Face Camera With Roll

  • Axis Lock Option: None

  • Camera Facing: Disabled

Required:

  • Screen Alignment: PSA Square

Note: Even setting the Required-Screen-Alignment to PSA Type Specific and in Mesh Data setting Axis Lock Option to Z doesn NOT help.

Only when I use Camera Facing the particles are NOT scaled anymore - but then they are not locked anymore so that they stay aligned with the ground.

alt text

As a comparison: Using normal particles (with a axis lock) it looks like that. The spawn-area gets scaled but NOT the particles themselfes:

alt text

Does anyone know how to prevent the mesh-particles from scaling?

avatar image iLegacy Aug 15 '17 at 04:45 PM

Here's a tutorial about this issue: https://youtu.be/W1LmTMH-XVI

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