Particles

Toggling off or unloading a Particle Object does not clear particles in normal mode

Version: 2.208
Date: 31/01/2026

Description

In editor, toggling off or unloading a Particle Object disables and clears all particles created by it.
In playtesting, the particles are not cleared and become separate from the particle object - any changes to the main object no longer affect the disconnected particles which continue to linger until they despawn.
This can cause lag by duplicating particle emitters.

Particles with Duration -1 may lose Animate on Trigger randomly

Version: 2.207
Date: 18/12/2025

Description

Particles with infinite (-1) Duration can lose both animate settings on when loading the editor.

Particles with long lifespans linger after a level restart if Quick Start is selected

Version: 2.207
Date: 18/12/2025

Description

Particles are not properly cleared when the level restarts if using the Quick Start option.

Uniform Color particles spawned by Spawn Particle are not uniform

Version: 2.207
Date: 18/12/2025

Description

A particle with the Uniform Color option that is spawned will use the color channel value at the time of spawning instead of syncing with the color channel continuously.

Weird transparency on particle objects

Version: 2.207
Date: 18/12/2025

Description

Particle objects calculate transparency inconsistently depending on what settings you select, as shown in the following table:

Additive	Obj Color	Uniform Color	Blending	Solid Alpha	Blending Alpha
No	No	No	Either	$(start\cdot (1-t)+end\cdot t))\cdot base$	-
No	No	Yes	No	$(start\cdot (1-t)+end\cdot t)\cdot base$	-
No	No	Yes	No	$(start\cdot (1-t)+end\cdot t)\cdot base$	-
No	Yes	No	No	$(base\cdot (1-t)+end\cdot t)\cdot base$	-
No	Yes	No	Yes	-	$(bas{e}^2\cdot (1-t)+end\cdot t)\cdot bas{e}^2$
Either	No	Yes	Yes	-	$(start\cdot (1-t)+end\cdot t)\cdot bas{e}^2$
Yes	Yes	No	No	$(base\cdot (1-t)+end\cdot t)\cdot base$	$((1-base)\cdot (1-t)+(1-end)\cdot t)\cdot base$
Yes	Yes	No	Yes	-	$(base\cdot (1-t)+end\cdot t)\cdot bas{e}^2$
Yes	No	No	Either	-	$(start\cdot (1-t)+end\cdot t)\cdot bas{e}^2$
Yes	No	Yes	No	$(start\cdot (1-t)+end\cdot t)\cdot base$	$((1-start)\cdot (1-t)+(1-end)\cdot t)\cdot base$

Notes:

• $start$ is the initial alpha, equal to: $Start\text{\_}A+Start\text{\_}A\text{\_}Rand$
• $end$ is the final alpha, equal to: $End\text{\_}A+End\text{\_}A\text{\_}Rand$
• $base$ is the alpha (opacity) of the base color channel.
  • The detail color channel's opacity is not used by particles.
  • Use Obj Color replaces $start$ with $base$ in all calculations.
  • $base$ is applied multiple times in some equations.
• For a particle to count as blending either the base or detail color must be blending.
  • If Use Obj Color or Uniform Obj Color are used with Additive but neither color channels blend, then the particle renders as both normal and additive.
• The resulting color for one particle is equal to: $BG\text{\_}RGB\ast (1-Solid\text{\_}Alpha)+Particle\text{\_}RGB\ast (Solid\text{\_}Alpha+Blending\text{\_}Alpha)$

Some Particle Objects can end up having erratic spin

Version: 2.207
Date: 18/12/2025
Level ID: 114681413

Description

Particle objects can get bugged and end up having very erratic movement.

Video

https://youtu.be/5zb-JCvD5JY

Particle sometimes fail to spawn when near the particle limit

Version: 2.207
Date: 18/12/2025

Description

The first particle in a particle loop will fail to spawn if the particle limit has been hit already.

This usually happens if $Emission\cdot Lifetime=MaxParticles$

Spawn Particle Position Group ID is tied to game FPS

Version: 2.207
Date: 18/12/2025
Level ID: 114953438

Description

The spawn position of particles with Spawn Particle is the position of the group at the last rendered frame, instead of the current position.
This can cause particles to spawn in the wrong position when dealing with high speed or instant movement when the game runs below 240 fps.
The bug only happens while playtesting and not in the editor.

Video

Video: 200, 300, 60 and 120 fps
Video: 120 fps vsync, mobile

Spawn Particle fails to spawn on inactive targets

Version: 2.207
Date: 18/12/2025

Description

Spawn Particle will not spawn if the target is inactive (position is off-screen).
This only happens while playtesting and not in the editor.
If the object was active on screen at least once before, the particle will spawn at its previous on-screen position.

Suggestions

While this might be intentional for performance reasons, there should be an option to allow the particle to spawn regardless of whether the target is active or not.

Workarounds

Link Visible can keep the target active as a potential workaround to this issue.

Video

https://youtu.be/Co1UDLP2Ahk

Particles ignore Skew X/Y when spawning

Version: 2.208
Date: 19/01/2026

Description

If a particle spawns after an object is warped / scaled, it will ignore skew Y value and only scale and rotate on X/Y