Particle System Randomize Direction, unwanted Z-axis randomizing

I’m making a particle effect using the Unity Particle System and am hoping to find a way to get more control over the RandomizeDirection feature. The game is 2D isometric and the particle effect happens in the XY axis, but RandomizeDirection also randomizes the Z axis and I need the particles to stay on the Z axis I originally assign them.

Any ideas on how to prevent particles from changing their Z value? Is there maybe a way in scripting to get at the particle emitter and prevent it from there?

Thanks for any help/ideas!

 

You can get at the particles, with Burst control, all particles (somewhere in the API) and there's some kind of vertex processing thing... too...

But before going down that route, what shape are you using to emit the particles?

If it's a 3D shape (like cone or cube) then it's going to randomise directions in 3D space, by default. If you use a 2D shape (like a circle) and keep it facing the direction of the particle system, you can ensure 2D randomisation of directions.

 

Using a circle

 

Yes it does! Thanks!

 

By default, a 3D form (such as a cone or a cube) will randomise directions in 3D space. You may guarantee 2D randomization of directions by using a 2D shape (such as a circle) and keeping it towards the direction of the particle system.

 

True until you use randomize direction. But Richard’s fix works.