fix stencil pass

Assets/Portal/Assets/Materials/FullScreenDepth.shader

@@ -1,21 +1,16 @@
 Shader "Escape Room Engine/FullScreenDepth" {
-	Properties {
-        _PortalNumber ("Portal Number", Int) = 1
-	}
+	Properties {}
+	
 	SubShader {
-		Pass
-		{
+		Pass {
             ColorMask 0
 		    Cull Off
             ZWrite On
 			ZTest Always
 			
-            Stencil
-            {
-                Ref [_PortalNumber]
-                Comp Equal // pass if equal
-                Pass Keep // keep stencil value
-                Fail Keep // keep stencil if depth fails
+            Stencil {
+                Ref 1
+                Comp LEqual
             }
 
             CGPROGRAM
@@ -23,18 +18,16 @@
             #pragma fragment frag
             #include "UnityCG.cginc"
 
-            void vert(appdata_img v, out float4 pos : SV_POSITION)
-            {
-                #ifdef UNITY_REVERSED_Z
+            void vert(appdata_img v, out float4 pos : SV_POSITION) {
+                #ifdef UNITY_REVERSED_Z // clip space [near 1, 0 far]
                 float far = 0.00001;
-                #else
+                #else // clip space [near -1, 1 far]
                 float far = 0.99999;
                 #endif
                 pos = float4(v.vertex.xy * 2.0, far, 1); // quad xy goes from -0.5 to 0.5, clip space from -1 to 1
             }
 
-            fixed4 frag() : SV_Target
-            {
+            fixed4 frag() : SV_Target {
                 return 0;
             }
             ENDCG

Assets/Portal/Assets/Materials/PortalStencil.mat

@@ -25,6 +25,6 @@ Material:
     m_TexEnvs: []
     m_Ints: []
     m_Floats:
-    - _PortalNumber: 1
+    - _PortalNumber: 0
     m_Colors: []
   m_BuildTextureStacks: []

Assets/Portal/Assets/Materials/PortalStencil.shader

@@ -1,23 +1,13 @@
-Shader "Escape Room Engine/PortalStencil"
-{
-    Properties
-    {
-        _PortalNumber ("Portal Number", Int) = 1
+Shader "Escape Room Engine/PortalStencil" {
+    Properties {
+        _PortalNumber ("Portal Number", Int) = 0
     }
 
-    SubShader
-    {
-        Tags
-        {
-            "RenderType"="Opaque" "RenderPipeline" = "UniversalPipeline"
-        }
+    SubShader {
+        Pass {
+            ColorMask 0 // don't draw this to the main framebuffer
 
-        Pass
-        {
-            ColorMask 0
-
-            Stencil
-            {
+            Stencil {
                 Ref [_PortalNumber]
                 Comp Always // always pass
                 Pass Replace // set stencil value