bktGlitch is a glitch shader with a variety of unique layered effects that will break your game... in a good way.



  • Effects such as tearing, noise, colour dispersion, glitch blocks, RGB splitting...
  • Written in GLSL ES - not limited to desktop platforms (note: if the shader fails to compile, try removing precision declarations/keywords)
  • Easy-to-use setup scripts and presets, no need to set up uniforms manually!
  • A demo where you can adjust all effects manually and even generate the resulting configuration code!
  • Available for both versions of GM:S.

@blokatt |

Please note: If you use GM:S 1.4 on Windows 10, shaders might not work unless you have DirectX 9 installed. I retain all rights to sprites and fonts used in this package.

If you can't buy this for whatever reason, go here.

End User Licence Agreement (EULA).

Changes in 1.2.0

Added version without calculation precision specifications due to issues on OS X.

Version 1.2.0. Published December 26, 2017

Created with GameMaker: Studio v1.4.1772

Age Rating: 4+

Average Rating

Your review

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Alex C 08 March 2019


Christian C 06 March 2019


Niels B 30 December 2018


James H 02 November 2018


Temperance K 10 October 2018


Anonymous 09 October 2018

Mac High Sierra

I am implementing this in my game but couldn't get the glitch to work in macOs High Sierra!


Blokatt (Publisher) 02 January 2019

Have you tried the included Mac version of the shader with type precision adjustments?
Unfortunately, I don't have access to any devices running macOS, so there is no way for me to easily fix this.


Anonymous 23 September 2018


Phil J 29 August 2018


Wanderson P 08 May 2018


Sol B 04 March 2018


Alexander Y 14 February 2018

So pretty

So easy to use. I'm going to use it everywhere all over the place. The demo menu is great. Thanks!


Gadyka 5 10 December 2017

This review was left for a previous version of this asset.


Tony S 09 December 2017

Perfect solution for your glitch needs.

Exactly what I was looking for. Also easy to implement. The website to help with settings is part of the experience and shows the creator knows what he is doing. I highly recommend this shader.

This review was left for a previous version of this asset.


Petr S 10 November 2017

Great shader

Please post updated version for macOS (see email)

This review was left for a previous version of this asset.


Blokatt (Publisher) 10 November 2017

I don't own a Mac myself, sorry, there's no way for me to fix this without knowing what went wrong.
The shader should work on multiple platforms, though, so if the HTML5 demo works for you, your GPU is compatible and this could potentially be a shader compiler issue and thus something YYG has to fix. All I can do is try rewriting it to GLSL instead.

EDIT: Got your message, working on it!


Rejon T 21 September 2017

Best Shader Ever

This shader coupled with it's online tool for creating cool effects is the perfect package for your (and my) needs. It delivers more than what I was expecting from it and has offered great flexibility. Setting it up was a breeze and using it with lerp/sine functions for the glitches intensity offers a perfect glitch on top of it.

On top of this, when I ran into issues with the shader on mobile devices Blokatt was responsive and extremely helpful.

This review was left for a previous version of this asset.

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