Just Chromatic Aberration

This is a little shader to create a chromatic aberration without any other effect, you can control de X and Y displacement of  each color (RGB) individually.

Shader code

// chromatic aberration
//---------------------------------

shader_type canvas_item;

uniform vec2 r_displacement = vec2(3.0, 0.0);
uniform vec2 g_displacement = vec2(0.0, 0.0);
uniform vec2 b_displacement = vec2(-3.0, 0.0);


void fragment()
{
	float r = texture(SCREEN_TEXTURE, SCREEN_UV + vec2(SCREEN_PIXEL_SIZE*r_displacement), 0.0).r;
	float g = texture(SCREEN_TEXTURE, SCREEN_UV + vec2(SCREEN_PIXEL_SIZE*g_displacement), 0.0).g;
	float b = texture(SCREEN_TEXTURE, SCREEN_UV + vec2(SCREEN_PIXEL_SIZE*b_displacement), 0.0).b;
	
	COLOR = vec4(r, g, b, 1.0);
}

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