Bug in "Source Movement" module

Development Asset Creation FX
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1

I found a bug in the Particle System in “Source Movement” module.

  1. Create Empty Project.
  2. Create new Particle System.
  3. Leave all settings by default.
  4. Add “Location” → “Source Movement” module.
  5. Select View and check Motion in the Viewport.

Particles moving in strange trajectories, sometimes moving with glitches.
Add this particle system to the any level. Move it with mouse. Position of many particles is wrong.
Screenshot:

124782-image_1.png
124782-image_1.png581×640 11.3 KB

Hope you can fix this bug in next releases :slight_smile:

2

“Use Fixed Relative Bounding Box” fixes this bug.

3

Hi mdeni,

This is more so a short coming of the cascade previewer. The reason this occurs is because the bounding box for the particle system is attempting to adapt in real time in the viewport. You can see this when you enable the bounds in the viewer. As soon as the system exceeds the bounds it recalculates and during this time the particles will shoot off quickly until the bounds are done adjusting.

I logged the ticket here: Unreal Engine Issues and Bug Tracker (UE-41681)

Keep in mind that there is a good chance this won’t be addressed quickly.

Cheers,

Ed

4

Thank you! I look forward to Niagara :wink: