Samuel Wolffang based rgb shift shader

basic rgb shift shader, have fun with it 

Shader code

shader_type canvas_item;
render_mode unshaded;

uniform sampler2D displace : hint_albedo;
uniform float dispAmt: hint_range(0,0.1);
uniform float abberationAmtX: hint_range(0,1);
uniform float abberationAmtY: hint_range(0,1);
uniform float dispSize: hint_range(0.1, 2.0);
uniform float maxAlpha : hint_range(0.1,1.0);

void fragment()
{
    //displace effect
    vec4 disp = texture(displace, SCREEN_UV * dispSize);
    vec2 newUV = SCREEN_UV + disp.xy * dispAmt;
    //abberation
    COLOR.r = texture(SCREEN_TEXTURE, newUV - vec2(abberationAmtX,abberationAmtY)).r; 
    COLOR.g = texture(SCREEN_TEXTURE, newUV).g; 
    COLOR.b = texture(SCREEN_TEXTURE, newUV + vec2(abberationAmtX,abberationAmtY)).b;
    COLOR.a = texture(SCREEN_TEXTURE, newUV).a * maxAlpha;
    }

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