[TRACKER] Particles issues

[kubecz3k]

3D/Multimesh:

• 3D particles blink when set a velocity of 0 3D particles blink when set a velocity of 0 #10183 (bug)
• Particles don't fire again when unmarking "One Shot" Particles don't fire again when unmarking "One Shot" #10181 (bug/enhancement)
• Emission shape "directed points" is unable to emit in negative directions Particles 3D: emission shape "directed points" is unable to emit in negative directions #10233 (bug)
• Shape mode "points" and "directed points": impossible to move emission point in negative axis Particles 3D, Shape mode "points" and "directed points": impossible to move emission point in negative axis #10236 (bug/enhancement)
• Particles 3D - gravity does not work if initial velocity iz zero Particles 3D - gravity does not work if initial velocity iz zero #10349 (bug)
• Particles 3D initial velocity always random Particles 3D initial velocity always random #10348 (bug)
• 3D particles emission gets chunky if framerate is slowed down 3D particles emission gets chunky if framerate is slowed down #10186 (archived)
• 3D particles are extremely laggy when seen close 3D particles are extremely laggy when seen close #10185 (archived)
• MultiMesh does not change color of instances MultiMesh does not change color of instances #10217 (archived)
• Particles and Particles2D preprocess property doesn't do anything Particles and Particles2D preprocess property doesn't do anything #12460 (bug)
• Ability to convert buildin shaders and spatial material to text Ability to convert buildin shaders and spatial material to text #10242 (enhancement)
• Not emitted particles affects performance Not emitted particles affects performance #19507 (bug)
• 3D particles cannot rotate 3D particles cannot rotate #10182 (bug)
• MultiMesh rendering issues in grid like setup Multimesh rendering issues in grid like setup #10253 (bug)
• Setting transform of meshes in MultiMesh produces an error Setting transform of meshes in MultiMesh produces an error #12595 (bug)
• Shape mode "points": points can be defined only in distance from 0 to 1 from the origin Particles 3D, Shape mode "points": points can be defined only in distance from 0 to 1 from the origin #10235 (enhancement)
• color gradient / albedo of mesh is preferred over particle material 3D Particles color gradient / albedo of mesh is preferred over particle material #9781 (enhancement)
• Change particles to use emission rate rather than max allowed particles. Change particles to use emission rate rather than max allowed particles.  #4294 (enhancement)
• Trail divisor is not very good Particles3D: trail divisor is not very good #10363 (enhancement)
• 3.0 Particles Shader: impossible to calculate current lifetime 3.0 Particles Shader: impossible to calculate current lifetime #11538 (enhancement)

Couple less strict issues:

• Particle 3d issues Particle 3d issues #10234 (bug)
• Particle System Improvement Particle System Improvement #6377 (feature proposal)
• Enhanced 2D and 3D particle system & tooling Enhanced 2D and 3D particle system & tooling #4250 (feature proposal)
• Particle System Enhancements [TRACKER] Particle System Enhancements #19358

2D:

• Observing fast moving Particles2D from a fast moving object causes visual glitch. Observing fast moving Particles2D from a fast moving object causes visual glitch.  #6373 (bug)
• emission_stopped signal for particles2d node emission_stopped signal for particles2d node  #10954 (enhancement)
• Particles with "one shot" enabled gets "emitting" turned off Particles with "one shot" enabled gets "emitting" turned off  #17903
• Particle2D emitting settings create unexpected results. Particle2D emitting settings create unexpected results. #4003 (bug)
• Particles2d random initial velocity doesn't seem to do anything Particles2d random initial velocity doesn't seem to do anything #10668 (bug)
• 2D particles are glitchy 2D particles are glitchy in Platformer demo godot-demo-projects#58 (bug in demo)

[kubecz3k]

Some issues for the future:

• Add Soft Particle to blend particle's edges Add Soft Particle to blend particle's edges #3834 (enhancement)
• 3D Particles, more explicit way to emit from mesh surface 3D Particles, move emission mesh creation menu to Inspector #11566 (enhancement)
• LOD is not working (also for particles) LOD is not working (also for particles) #8806 (bug)
• Quick trails, vector fields and collisions for particles Quick trails, vector fields and collisions for particles #8583 (feature proposal)
• Particles bouncing off of collision objects? Particles bouncing off of collision objects? #3994 (feature proposal)

Hope didn't miss anything...
(fell free to propose related issues, but note that I will moderate this thread in case of off-topics)

[maxim-sheronov]

Hi. Is it possible to use custom mesh as emission_shape for particles 3d? For example, I want emission from surface (or volume) of my 3d model. I did not find such issues, maybe it can be added to this list.

[volzhs]

@maxim-sheronov
https://twitter.com/reduzio/status/850156344871198720
https://twitter.com/reduzio/status/850077188275798018

[maxim-sheronov]

@volzhs thanks! The second post is what I am asking about.

[ghost]

Some of these have already been closed. It would be nice to mark them so it doesn't look like particles are completely broken. :D

[curly-brace]

are those all known issues? because for me particles disappear in editor if i rotate view to some point, particles do not respect any settings concerning circular motions and orbiting, they cannot be made rotated according to their velocity (like pointing outwards of emission point), they do not scale.

[SirPigeonz]

@curly-brace
If you find any bugs in Godot. Search for it in Issues using searchbar. If you don't find issue matching your bug, create new report. Then Godot contributes will assign labels and milestones for it.

This list is only as of a help for potential bugfixers to find something to work on. It's not automatic so it can be outdated a bit.

[LikeLakers2]

Just commenting here to remind somebody (kubecz3k or someone who can edit his original comment) to update this tracker.

Checking through what's listed here, here's what I'd remove from the list (if it ended up not being a bug) or check off (if it's been fixed):

• (Not a bug) 3D particles emission gets chunky if framerate is slowed down 3D particles emission gets chunky if framerate is slowed down #10186 (bug)
• (Not a bug) 3D particles are extremely laggy when seen close 3D particles are extremely laggy when seen close #10185 (bug)
• (Not a bug) MultiMesh does not change color of instances MultiMesh does not change color of instances #10217 (bug)
• (Fixed?) Particles 3D - gravity does not work if initial velocity iz zero Particles 3D - gravity does not work if initial velocity iz zero #10349 (bug)
• (Fixed?) Particles 3D initial velocity always random Particles 3D initial velocity always random #10348 (bug)
• (Moved to 2D particles are glitchy in Platformer demo godot-demo-projects#58) 2D particles are glitchy 2D particles are glitchy in Platformer demo #9884 (bug)
• (Fixed) Add Soft Particle to blend particle's edges Add Soft Particle to blend particle's edges #3834 (enhancement)

[kubecz3k]

@LikeLakers2 thanks!

[pwab]

#12460 was fixed on master (for 2.1 there is #13336).
#10242, #10668 and godotengine/godot-demo-projects#58 were fixed.

[MelvinWM]

Added #17903.

[chanon]

Some additional particle issues I found:
#20473
#16411
#14697
#13488
#10232

[pwab]

Only one issue in the starting post is left. Maybe the tracker should be reduced to only bugs as proposals for enhancements are moved to godotengine/godot-proposals#815 right now?

[akien-mga]

Indeed, thanks for the triage.
Let's close this as partly fixed, and the rest superseded by godotengine/godot-proposals#815.