Added test-scene for GoPro lens distortion real-vs-simulated overlay …

…comparison

unity/Assets/Standard Assets/Characters/FirstPersonCharacter/StretchCalibration/Materials/gopro_source/CameraBlender.cs

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+using UnityEngine;
+
+[ExecuteInEditMode]
+public class CameraBlender : MonoBehaviour
+{
+    public Camera camera1;
+    public Camera camera2;
+    public Camera blendedCamera;
+
+    public RenderTexture renderTexture1;
+    public RenderTexture renderTexture2;
+    public Material blendMaterial;
+
+    [Range(0, 100)]
+    public float blendAmount = 50;
+
+    void Start()
+    {
+        if (camera1 != null)
+        {
+            camera1.targetTexture = renderTexture1;
+        }
+        if (camera2 != null)
+        {
+            camera2.targetTexture = renderTexture2;
+        }
+
+        if (blendMaterial != null)
+        {
+            blendMaterial.SetTexture("_MainTex1", renderTexture1);
+            blendMaterial.SetTexture("_MainTex2", renderTexture2);
+        }
+    }
+
+    void Update()
+    {
+        if (blendMaterial != null)
+        {
+            blendMaterial.SetFloat("_BlendAmount", blendAmount / 100f);
+        }
+    }
+
+    void OnRenderImage(RenderTexture src, RenderTexture dest)
+    {
+        if (blendMaterial != null)
+        {
+            Graphics.Blit(null, dest, blendMaterial);
+        }
+    }
+}

unity/Assets/Standard Assets/Characters/FirstPersonCharacter/StretchCalibration/Materials/gopro_source/Checkerboard_Camera_Profile.asset

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unity/Assets/Standard Assets/Characters/FirstPersonCharacter/StretchCalibration/Materials/gopro_source/EliShader.shader

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+Shader "Custom/BlendShader"
+{
+    Properties
+    {
+        _MainTex1 ("Texture 1", 2D) = "white" {}
+        _MainTex2 ("Texture 2", 2D) = "white" {}
+        _BlendAmount ("Blend Amount", Range(0, 1)) = 0.5
+    }
+    SubShader
+    {
+        Tags { "RenderType"="Opaque" }
+        Pass
+        {
+            CGPROGRAM
+            #pragma vertex vert
+            #pragma fragment frag
+
+            #include "UnityCG.cginc"
+
+            struct appdata_t
+            {
+                float4 vertex : POSITION;
+                float2 uv : TEXCOORD0;
+            };
+
+            struct v2f
+            {
+                float2 uv : TEXCOORD0;
+                float4 vertex : SV_POSITION;
+            };
+
+            sampler2D _MainTex1;
+            sampler2D _MainTex2;
+            float _BlendAmount;
+
+            v2f vert (appdata_t v)
+            {
+                v2f o;
+                o.vertex = UnityObjectToClipPos(v.vertex);
+                o.uv = v.uv;
+                return o;
+            }
+
+            fixed4 frag (v2f i) : SV_Target
+            {
+                fixed4 col1 = tex2D(_MainTex1, i.uv);
+                fixed4 col2 = tex2D(_MainTex2, i.uv);
+                return lerp(col1, col2, _BlendAmount);
+            }
+            ENDCG
+        }
+    }
+}

unity/Assets/Standard Assets/Characters/FirstPersonCharacter/StretchCalibration/Materials/gopro_source/EliShader_Mat.mat

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unity/Assets/Standard Assets/Characters/FirstPersonCharacter/StretchCalibration/Materials/gopro_source/RenderTexture1.renderTexture

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unity/Assets/Standard Assets/Characters/FirstPersonCharacter/StretchCalibration/Materials/gopro_source/RenderTexture2.renderTexture

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