When a new class is created and exposed to scripting, the editor's interface will display it with a default icon representing the base class it inherits from. In most cases, it's still recommended to create icons for new classes to improve the user experience.
To create new icons, you first need a vector graphics editor installed. For instance, you can use the open source Inkscape editor.
godot repository containing all the editor icons:
git clone https://github.com/godotengine/godot.git
The icons must be created in a vector graphics editor in SVG format. There are two main requirements to follow:
Icons must be 16×16. In Inkscape, you can configure the document size in File > Document Properties.
Lines should be snapped to pixels whenever possible to remain crisp at lower DPI. You can create a 16×16 grid in Inkscape to make this easier.
Once you're satisfied with the icon's design, save the icon in the cloned
editor/icons folder. The icon name should match the intended
name in a case-sensitive manner. For example, to create an icon for
CPUParticles2D, name the file
Color conversion for light editor themes¶
If the user has configured their editor to use a light theme, Godot will convert the icon's colors based on a set of predefined color mappings. This is to ensure the icon always displays with a sufficient contrast rate. Try to restrict your icon's color palette to colors found in the list above. Otherwise, your icon may become difficult to read on a light background.
Because the editor renders SVGs once at load time, they need to be small in size so they can be efficiently parsed. Editor icons must be first optimized before being added to the engine, to do so:
Run the command below, replacing
svg_source.svgwith the path to your SVG file (which can be a relative or absolute path):
svgcleaner --multipass svg_source.svg svg_optimized.svg
--multipass switch improves compression, so make sure to include it.
The optimized icon will be saved to
svg_optimized.svg. You can also change
the destination parameter to any relative or absolute path you'd like.
While this optimization step won't impact the icon's quality noticeably, it will still remove editor-only information such as guides. Therefore, it's recommended to keep the source SVG around if you need to make further changes.
If you're contributing to the engine itself, you should make a pull request to
add optimized icons to
editor/icons in the main repository. Recompile the
engine to make it pick up new icons for classes.
If icons don't appear in the editor, make sure that:
modules/svgis enabled (it should be enabled by default). Without it, icons won't appear in the editor at all.