Double Vision w/ chromatic aberration

to use this shader, add a colorrect or something as a child of your character controller (not as a child of the camera as we want it to apear infront of everything for the proper double vision effect) this is my first shader btw, please point out any issues! my yt is : https://www.youtube.com/@xXUnhingedDevXx

Shader code

shader_type canvas_item;

uniform lowp sampler2D screen_texture : hint_screen_texture, filter_nearest_mipmap, repeat_enable;
uniform lowp float alpha : hint_range(0.0, 1.0);
uniform lowp float scale : hint_range(0.0, 2.0);

uniform lowp float red_shift;
uniform lowp float blue_shift;
uniform lowp float green_shift;

uniform lowp float red_mult = 1;

void fragment() {
	vec2 uvs = SCREEN_UV * scale;
	vec4 final_texture  = texture(screen_texture, uvs);
	
	float r = texture(screen_texture, uvs + vec2(SCREEN_PIXEL_SIZE*red_shift), 0.0).r * red_mult;
	float g = texture(screen_texture, uvs + vec2(SCREEN_PIXEL_SIZE*green_shift), 0.0).g;
	float b = texture(screen_texture, uvs + vec2(SCREEN_PIXEL_SIZE*blue_shift), 0.0).b;
	
	COLOR = vec4(r, g, b, alpha);
}

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