GameMaker (2.3)

UBG Room Transition System

Upset Baby Games

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NOTE: Version 1.1.0 is a complete rewrite and does NOT have backwards compatibility! Upgrading will require project changes!

If you want smooth room transition effects in your game, look no further. This extension provides you with all you need to get going quickly as well as for designing your own transitions with ease!

Initial Setup

There is none! Simply call room_goto_transition to switch rooms while using a transition effect. You can set the desired room transition, via a rt_* constant name, and/or transition duration through dedicated functions or through the transition function itself.

There are also two experimental features that allow you to freeze the room while the transition is running and apply transition effects to the GUI layers.


This extension is made to be as simple to use as possible but feature rich as well. Here are some highlights:

  • Over 35 transitions included out of the box
  • Instance freezing can make the game wait for the transition. Handles deactivated instances perfectly fine (currently experimental).
  • Adding your own transitions is a piece of cake. Your transition code is automatically provided with a snapshot of each room, a surface to render to, and the percentage through the transition.
  • System handles most situations with ease. If you change screen sizes between rooms or have multiple cameras running the system can still function just fine.
  • No setup required! Just pop in the extension and call the room_goto_transition function out-of-the-box!
  • Transitions are handled in realtime not game time. Lag, or changing FPS mid-way through your project doesn't alter the transitions at all.

Platform Support / Resources

This system is programmed in native GML with all systems in mind. It has not been tested on mobile or browser exports at this time, however.


Is there something here you need or want? Came a cross a bug? Let me know! I actively maintain all my extensions for the lifetime of the product they are targeted for.


Take a look at the built-in transition effects by clicking this video:

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End User Licence Agreement (EULA).

Age Rating: 4+


GMS2 - Version 1.0.4. Published December 12, 2020

  • Added 7 new transitions to the system including page flip (left / right), spin (left / right), fade-to-black, drops, and pixelate.

GMS2.3 - Version 1.1.0. Published September 28, 2021

  • Complete system rewrite
  • Removed transition 'book_flip' and 'falling rows'
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