RGB Split Shader

Unity Engine
1

I’m nit a shader programmer, but would appreciate if someone can point in the right direction. I want a shader that does an RGB Split like in the video posted below.

I wouldn’t mind to buy it off the asset store but I checked most of the packages and none seem to have it.

2

My “aubergines postprocess effects” pack has this effect. Its the _Lightwave shader in the package.
You need unity pro for it.

3

excellent … buying now

4

I have my email in the readme file, let me know when you need customization or extra features as its pretty generic out of the box.

5

Thank for the quick response. Got my customized shader in minutes.

This is the link to the asset on the store

6

For those who want to know the basis for how its done, heres a free example below

Reference : Jahfer's Blog

Shader "Custom/ChromaticAberration" {
	Properties {
		_MainTex ("Base (RGB)", 2D) = "white" {}
	}
	SubShader 
	{
		Pass
		{
		
		CGPROGRAM
		#pragma vertex vert_img
		#pragma fragment frag
		#pragma fragmentoption ARB_precision_hint_fastest
		#include "UnityCG.cginc"

		uniform sampler2D _MainTex;
		uniform float _AberrationOffset;

		float4 frag(v2f_img i) : COLOR
		{

			float2 coords = i.uv.xy;
			
			_AberrationOffset /= 300.0f;
			
			//Red Channel
			float4 red = tex2D(_MainTex , coords.xy - _AberrationOffset);
			//Green Channel
			float4 green = tex2D(_MainTex, coords.xy );
			//Blue Channel
			float4 blue = tex2D(_MainTex, coords.xy + _AberrationOffset);
			
			float4 finalColor = float4(red.r, green.g, blue.b, 1.0f);
			return finalColor;
		
		}

		ENDCG
		} 
	}
}

C# code, gets attached to the camera

using UnityEngine;
using System.Collections;

[ExecuteInEditMode]
public class ChromaticAberration : MonoBehaviour {
	
	#region Variables
	public Shader curShader;
	public float ChromaticAbberation = 1.0f;
	private Material curMaterial;
	#endregion
	
	#region Properties
	Material material
	{
		get
		{
			if(curMaterial == null)
			{
				curMaterial = new Material(curShader);
				curMaterial.hideFlags = HideFlags.HideAndDontSave;	
			}
			return curMaterial;
		}
	}
	#endregion
	// Use this for initialization
	void Start () 
	{
		if(!SystemInfo.supportsImageEffects)
		{
			enabled = false;
			return;
		}
	}
	
	void OnRenderImage (RenderTexture sourceTexture, RenderTexture destTexture)
	{
		if(curShader != null)
		{
			material.SetFloat("_AberrationOffset", ChromaticAbberation);
			Graphics.Blit(sourceTexture, destTexture, material);
		}
		else
		{
			Graphics.Blit(sourceTexture, destTexture);	
		}
		
		
	}
	
	// Update is called once per frame
	void Update () 
	{
		
	}
	
	void OnDisable ()
	{
		if(curMaterial)
		{
			DestroyImmediate(curMaterial);	
		}
		
	}
	
	
}
1 Like
7

This looks quite awesome! I was wondering if there was a possible solution for Unity Free to achieve something similar to the referenced post: http://blog.jahfer.com/2012/04/02/experimenting-shaders-openframeworks/? Cheers~

8

You are better of using Echologin’s Post FX here: https://www.assetstore.unity3d.com/#/content/13919
You can do that effect and so much more.

9

Thanks for the heads up! Much appreciated.