Inverted Color Crosshair

A simple CanvasItem shader that inverts the colors behind it using a mask. Useful for, e.g., creating a crosshair that you can always see.

Just add the shader to a Sprite or TextureRect and set an image to use as a mask. The area covered by the mask will be inverted.

Shader code

shader_type canvas_item;

void fragment() {
	COLOR.rgb = 1.0 - textureLod(SCREEN_TEXTURE, SCREEN_UV, 0.0).rgb;
	COLOR.a = texture(TEXTURE , UV).a;
}

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