Actually, it's not just sprites it paints.

Image editor right within Godot 4!

Just press the colorful button above the viewport to edit a Node's texture, or an image file in the project folder!

• Box and Wand selections, which mask effects of drawing tools. The underlying pixels can be dragged and dropped elsewhere;
• 1-pixel pencil - can erase if secondary color is transparent;
• Round brush with eraser and smooth option;
• A classic bucket tool with a gradient variant;
• Line drawing;
• A number of shapes to shape your graphics;
• And a bit of scripting support.

Other features:

• Quick operations on the image: flip, rotate, and resize;
• Press Alt to pick color from editor window;
• Grid overlay for Sprites with Frames and Maps with Tiles;
• Region overlays for Atlastextures and Spriteframes;
• Full Undo support.

Made by Don Tnowe in 2022.

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Copying and Modification is allowed in accordance to the MIT license, full text is included.

Some shader code is from https://iquilezles.org/articles, released under the MIT License.

Icon made in Sprite Painter [tm]