GPU Particles 2D UI bug when trail is at limit

[rokn]

Tested versions

• Reproducible in: 4.2.1.stable

System information

MacBook Pro m3

Issue description

After playing around with GPU Particles 2D and their trails I managed to break the Godot UI in some pretty interesting way:

Screen.Recording.2024-06-03.at.02.49.10.mov

The breaking seems to be coming after setting the lifetime of the trail to 0.01(or less than that as it just jumps back to it)

Steps to reproduce

1. Download the MRP
2. Open the scene
3. Start toggling the Trails -> Enabled property of the particle system

Minimal reproduction project (MRP)

https://github.com/rokn/GodotParticleTest

[JekSun97]

I tested your project on Windows 10, no such problem arose.

Could you give the exact system requirements of your device, you can do this in the editor using the menu "Help -> Copy System Info"

[rokn]

Godot v4.2.1.stable - macOS 14.1.0 - Vulkan (Forward+) - integrated Apple M3 Pro - Apple M3 Pro (11 Threads)

[AThousandShips]

@rokn Can you test on 4.2.2? This might have already been solved

[rokn]

Nope, same on 4.2.2

[Rudolph-B]

@rokn I was able to generate the error message you received on v4.2, v4.3, v4.4, and the current master. I was only able to create artifacts in v4.4 and v4.5 (See attached video from v4.5).

Screencast.from.2025-06-15.19-43-04.webm

The error message also occurs for GPUParticles3D but It doesn't seem to create any artifacts there