Updated to a new version of unity, 2018.1.4f1. Also fixed a bug, where divison by zero would cause the screen to go black

Author: Camacho

Assets/OpenRelativity/Shaders/desaturateShader.shader

@@ -1,3 +1,5 @@
+// Upgrade NOTE: replaced 'mul(UNITY_MATRIX_MVP,*)' with 'UnityObjectToClipPos(*)'
+
 Shader "Colors/Desaturate" {
 	Properties {
 		_MainTex ("Base (RGB)", 2D) = "" {}
@@ -78,7 +80,7 @@ Shader "Colors/Desaturate" {
 	v2f vert( appdata_img v ) {
 		v2f o;
 
-		o.pos = mul(UNITY_MATRIX_MVP, v.vertex);
+		o.pos = UnityObjectToClipPos(v.vertex);
 		o.uv1.xy = v.texcoord;
 
 		//You need this otherwise the screen flips and weird stuff happens

Assets/OpenRelativity/Shaders/relativity.shader

@@ -1,3 +1,7 @@
+// Upgrade NOTE: replaced '_Object2World' with 'unity_ObjectToWorld'
+// Upgrade NOTE: replaced '_World2Object' with 'unity_WorldToObject'
+// Upgrade NOTE: replaced 'mul(UNITY_MATRIX_MVP,*)' with 'UnityObjectToClipPos(*)'
+
 Shader "Relativity/ColorShift" 
 {
 	Properties 
@@ -80,7 +84,7 @@ Shader "Relativity/ColorShift"
 	{
 		v2f o;
 
-		o.pos = mul(_Object2World, v.vertex); //get position in world frame	
+		o.pos = mul(unity_ObjectToWorld, v.vertex); //get position in world frame	
 		o.pos -= _playerOffset; //Shift such that we use a coordinate system where the player is at 0,0,0
 
 
@@ -91,17 +95,10 @@ Shader "Relativity/ColorShift"
 
 
 		float vuDot = (_vpc.x*_viw.x + _vpc.y*_viw.y + _vpc.z*_viw.z); //Get player velocity dotted with velocity of the object.
-		float4 uparra;
-		//IF our speed is zero, this parallel velocity component will be NaN, so we have a check here just to be safe
-		if ( speed != 0 )
-		{
-			uparra = (vuDot/(speed*speed)) * _vpc; //Get the parallel component of the object's velocity
-		}
-		//If our speed is zero, set parallel velocity to zero
-		else
-		{
-			uparra = 0; 
-		}
+
+		float4 uparra = (vuDot / (speed * speed)) * _vpc;
+		uparra = !(isnan(uparra) || isinf(uparra)) ? uparra : 0;
+
 		//Get the perpendicular component of our velocity, just by subtraction
 		float4 uperp = _viw - uparra;
 		//relative velocity calculation
@@ -229,13 +226,13 @@ Shader "Relativity/ColorShift"
 		riw += _playerOffset;
 
         //Transform the vertex back into local space for the mesh to use it
-		o.pos = mul(_World2Object*1.0,riw);
+		o.pos = mul(unity_WorldToObject*1.0,riw);
 
-		o.pos2 = mul(_Object2World, o.pos );
+		o.pos2 = mul(unity_ObjectToWorld, o.pos );
 		o.pos2 -= _playerOffset;
 
 
-		o.pos = mul(UNITY_MATRIX_MVP, o.pos);
+		o.pos = UnityObjectToClipPos(o.pos);
 
 
 		return o;

Assets/OpenRelativity/Shaders/skybox.shader

@@ -1,3 +1,7 @@
+// Upgrade NOTE: replaced '_Object2World' with 'unity_ObjectToWorld'
+// Upgrade NOTE: replaced '_World2Object' with 'unity_WorldToObject'
+// Upgrade NOTE: replaced 'mul(UNITY_MATRIX_MVP,*)' with 'UnityObjectToClipPos(*)'
+
 Shader "Relativity/SkyboxShift" {
 	Properties {
 		_MainTex ("Base (RGB)", 2D) = "" {}
@@ -72,8 +76,8 @@ Shader "Relativity/SkyboxShift" {
 		v2f o;
 
 
-		o.pos = mul(UNITY_MATRIX_MVP, v.vertex);
-		o.pos2 = mul(_Object2World, v.vertex);
+		o.pos = UnityObjectToClipPos(v.vertex);
+		o.pos2 = mul(unity_ObjectToWorld, v.vertex);
 
 		o.pos2 -= _playerOffset;
 
@@ -220,7 +224,7 @@ Shader "Relativity/SkyboxShift" {
 		float3 rgbFinal = XYZToRGBC(xf,yf,zf);
 		//rgbFinal = constrainRGB(rgbFinal.x,rgbFinal.y, rgbFinal.z);
 
-  		float4x4 temp  = mul(1.0*_Object2World, _World2Object);
+  		float4x4 temp  = mul(1.0*unity_ObjectToWorld, unity_WorldToObject);
 		float4 temp2 = mul( temp,float4( (float)rgbFinal.x,(float)rgbFinal.y,(float)rgbFinal.z,1));
 		//float4 temp2 =float4( (float)rgbFinal.x,(float)rgbFinal.y,(float)rgbFinal.z,1);
 		return temp2; 

Packages/manifest.json

@@ -0,0 +1,4 @@
+{
+	"dependencies": {
+	}
+}