Flash with modulate preserve

It does just what the title says ;D

Features:

– choose the flash color

– choose the flash value

You may smoothly animate it or make an instantaneous change.

Shader code

shader_type canvas_item;

uniform vec4 flash_color : source_color = vec4(1.0, 1.0, 1.0, 1.0);
uniform float flash_value : hint_range(0.0, 1.0, 0.1) = 0.0;

void fragment() {
    COLOR = mix(COLOR, vec4(flash_color.rgb, COLOR.a), flash_value);
}

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