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why cant I use uppercase letters for prefixes?
I usually start my globals with an uppecase

btw the option is a great idea :D

UI is super tiny on 4k

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Thanks for mentioning it! I'll investigate the issue and fix it (if confirmed) in the next update. Added to Trello:


Got this on yoyo marketplace a while back and I love it, but I have one request- in the spot where you can change the size gain of the particle, the program doesn't allow a negative number.  So if I want a particle to shrink into nothingness, I have to manually change the GML code after exporting.  It's not a huge deal, but it would be nice to be able to preview the shrinking particles.


Thanks for buying Geon FX!
I'll add the feature to the next update. 

I've double-checked. Negative numbers work fine in Geon FX 1.3 on Windows. 

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Ah, the issue seems to be that I had to type in "-0.01" or something rather than "-.01", since the initial 0 seemed to be required to work properly.  Glad to have figured it out, thank you!


When trying to run this on my iMac, it fails to run and I receive an error stating, "Unable to find game."

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It's been 2 months. still not functioning. still no reply.

It has been confirmed to work fine on Mac. Need more details to understand. Looks like your macOS firewall blocks the app and puts it into quarantine. Please read the FAQ section:

Thanks. You were correct. Everything is working flawless.

I was going to make my own particle designer but after trying Geon FX what's the point. Everthing I wanted from a particle designer and more. Awesome stuff.

Thank you very much! Working to improve it even futher. GIF export is on the way!

Hello !

i'm having a annoying bug with geon FX, whenever I open an existing project, and then close the program, the project file is automatically deleted from my drive, if I choose to not save changes the project is just lost (while I would expect the file to just remain as it is like any other program does)

Sorry for that, I'll discover what's wrong and release an update asap. Thanks for reporting.

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Using this in GMS2 for some time now and it's very good :)

A huge addition would be the possibility to export a sequence as a sprite sheet to make some particles follow an object

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Thanks! Working on Export to GIF and Sprite sheet options.

You can make particles follow an object. Please examine the example.

Will the update be coming to yoyogames marketplace?

Yes, it's there already.

Cool. it wasn't any update log so it says 1.0.1 on the homepage. 

Thanks for the update :)

Somehow it's a problem: it doesn't show any update log for the GMS2 on the Marketplace

A year ago, I asked if this would work with a couple of engines that I use. Finaly, I decided to try and learn GMS (I'm using vers 1.4.x). So I'm gonna acquire this tool. That said I have a couple of questions if you do not mind.

1- You said you were working on gif and png exports, is it implemented now or still being developped?

2- The user @GodLabs Studios asked about a way to implement the work he/she has done in Geon-FX in his existent project and you seem to have provide help. But it seems that the file need (unless i misunderstood) is on yoyo market , not here on itch. Does it mean I would have to go there to acquire that file?

3- Is the tool still under developement for 1.4 or are you focusing on 2 only? (I have no intention to acquire GM2 at the moment, so I want to make sure that GMS is still well supported).

Thanks for your time.

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Thanks for your interest in Geon FX!

  1. There is a first touch on PNG export in the newest update of Geon FX (press F9). But we are still  working on it. 
  2. Everything you need is here. Even the Geon_FX_-_Particle_Editor.gmez asset from Marketplace. Just import it into your project. You don't have to acquire any additional stuff.
  3. GMS1 and GMS2 are both fully supported. No limitations

I will be happy to assist you with any questions. 

Thank you very much. I will then purchase it right away and when learning to use it, if I need any help, I will take your word for it, and ask for your help. ^_^


I have purchased the software and find it very cool and was messing about changing the included fxs and saving the changes to the geon file the editor seems to save the geon file but on going to load the changed geon file it's not where I saved it .

G:\Geon_FX_Pro_v1_0b_Win\Effects\100\100.geon = original file

I would change it and save it as

G:\Geon_FX_Pro_v1_0b_Win\Effects\100\100mod.geon  but file is not saved here .

Instead it is saved in

C:\Users\username\AppData\Local\Geon_FX_Editor which is not expected as path is shown as above.

I have Win 10 if that helps.


Thanks for report! Working on it. Please subscribe for updates.

Fixed. Please update.

Hi. I'm sorry, I've not been on the site for a while. Were you posting this to someone else? It is not anything I am familiar with.


I bought the softwar and used the particle creator, it's really cool and made some cool effects with it. Awesome Stuff! Once done I used the export to GMS 2 option and got the GML code.

I am unable to figure out how to use these particles inside GMS 2. The included gmz file is a complete project but I want to use GeonFX in my previously made projects, and in documentation it says to add gmez extension but that file is not available?

It's likely that I am missing something very basic.

Can you please help me with this?


Thank you for buying Geon FX! You can export particles to GML and put them into your code: 

Just copy and paste the code into your project. The extension is provided via the GameMaker: Marketplace. I'll add it here too for your comfort.

Thanks !!

I am not able to link my purchase to Game Maker Marketplace. And it's asking me to purchase again.

Can you please add the extension on download page? That would be really helpful!


Added Geon_FX_-_Particle_Editor.gmez. Please check, download and import following the instruction here:

Great it worked now!! Thank you for the quick support :D

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Any chance to have it for 001 Game Creator, GDevelop and Godot? Those are the engines I'm currently using.

Hi, I will have to take a look how much different their formats are and how to convert to them. What about built-in editors for those engines? Do they suck? I'm working on export to GIF and PNG strip right now.

Hi and thanks for your reply.

Honestly, I'm not a programmer, I'm a multimedia designer with my main focus on game art. So I don't use those engines often. I have them because I'm learning my way around (when I have some free time) and because the programmers I'm working with at the moments use them, so I need them for testing my assets, etc. I can't tell you much about how good their build-in editors are compared to GMS for example. Godot and Gdevelop are FOSS so you can download them and see. For 001 it's proprietary but they have a demo version (I think) so you can try that too. Anyway those three engines lacks stuffs like GeonFX, so I think it's almost a "open" market for you. You should take your chances ^_^. Ren'Py also being very popular, maybe you might wanna check that too.

I have bought GMS 1.4, two or three years ago, but I doubt I'll use it since I'm quite bad at coding, that mean I might not (maybe I'll change my mind later) aquire GeonFX for now. 

Any chance you could make it compatible for Construct 2 or Clickteam Fusion?

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Yes, we'll be working on it. Please follow us on Twitter for more details on upcoming updates:

Awesome, done. Let me know if you do any Alpha/Beta test for Construct 2 (main engine I'm working in ATM), I'd be happy to test.