fix box origin, limit water level to always be below camera

Assets/sunset_box/Sunset Env.mat

@@ -72,6 +72,7 @@ Material:
     - _Glossiness: 0.5
     - _GlossyReflections: 1
     - _Grid: 0
+    - _HeightOffset: -0.7
     - _HorizonTint: 0.1
     - _Metallic: 0
     - _Mode: 0

Assets/sunset_box/sunset_box.unity

@@ -186,7 +186,7 @@ MonoBehaviour:
   m_Script: {fileID: 11500000, guid: a37fd8d654d5c2840a0ab3a5ad65a5ae, type: 3}
   m_Name: 
   m_EditorClassIdentifier: 
-  spawnHeight: 0
+  spawnHeight: 0.6
   useAdditionalValues: 0
   syncValues: []
   propPrivacy: 1
@@ -221,7 +221,7 @@ SphereCollider:
   m_Enabled: 1
   serializedVersion: 2
   m_Radius: 0.05
-  m_Center: {x: 0.7, y: 0.05, z: -0.8}
+  m_Center: {x: 0.75, y: 0, z: -0.75}
 --- !u!1 &1702728164
 GameObject:
   m_ObjectHideFlags: 0
@@ -248,7 +248,7 @@ Transform:
   m_PrefabAsset: {fileID: 0}
   m_GameObject: {fileID: 1702728164}
   m_LocalRotation: {x: 0, y: 0, z: 0, w: 1}
-  m_LocalPosition: {x: 0.7, y: 0.05, z: -0.8}
+  m_LocalPosition: {x: 0.75, y: 0, z: -0.75}
   m_LocalScale: {x: 0.1, y: 0.1, z: 0.1}
   m_Children: []
   m_Father: {fileID: 733733049}
@@ -412,6 +412,11 @@ PrefabInstance:
       propertyPath: m_RootOrder
       value: 0
       objectReference: {fileID: 0}
+    - target: {fileID: -8679921383154817045, guid: 5009e49fafd33ed0e980b53b1f9e954d,
+        type: 3}
+      propertyPath: m_LocalScale.y
+      value: 1
+      objectReference: {fileID: 0}
     - target: {fileID: -8679921383154817045, guid: 5009e49fafd33ed0e980b53b1f9e954d,
         type: 3}
       propertyPath: m_LocalPosition.x
@@ -430,12 +435,12 @@ PrefabInstance:
     - target: {fileID: -8679921383154817045, guid: 5009e49fafd33ed0e980b53b1f9e954d,
         type: 3}
       propertyPath: m_LocalRotation.w
-      value: 0.7071068
+      value: 1
       objectReference: {fileID: 0}
     - target: {fileID: -8679921383154817045, guid: 5009e49fafd33ed0e980b53b1f9e954d,
         type: 3}
       propertyPath: m_LocalRotation.x
-      value: -0.7071068
+      value: 0
       objectReference: {fileID: 0}
     - target: {fileID: -8679921383154817045, guid: 5009e49fafd33ed0e980b53b1f9e954d,
         type: 3}
@@ -450,7 +455,7 @@ PrefabInstance:
     - target: {fileID: -8679921383154817045, guid: 5009e49fafd33ed0e980b53b1f9e954d,
         type: 3}
       propertyPath: m_LocalEulerAnglesHint.x
-      value: -90
+      value: 0
       objectReference: {fileID: 0}
     - target: {fileID: -8679921383154817045, guid: 5009e49fafd33ed0e980b53b1f9e954d,
         type: 3}

Assets/sunset_box/sunset_env_dynamic.shader

@@ -21,6 +21,7 @@
 		_StarSizeRandom ("Star size randomness", Range(0, 1)) = 0.5
 		_StarTint ("Star tint", Range(0, 1)) = 0.4
 		[Header(Water)]
+		_HeightOffset ("Height offset", Range(-10, 10)) = -0.5
 		_WaterCol ("Water color", Color) = (0.03, 0.08, 0.12, 1.0)
 		_WaveStrength ("Wave scale", Range(0, 1)) = 1
 		[NoScaleOffset]
@@ -78,6 +79,7 @@
 
 			sampler2D _WaterSurface;
 			float3 _WaterCol;
+			float _HeightOffset;
 			float _WaveStrength;
 
 			float _Grid;
@@ -170,15 +172,15 @@
 				float3 sun_dir = float3(sin(_SunAngle), 0, cos(_SunAngle));
 
 				float water_mod = 0;
-				// float water_reflection = 0;
 
 				float3 dir = normalize(i.hit_pos - i.cam_pos);
 				float theta = atan2(dir.x, dir.z); // latitude
 				float phi = asin(dir.y); // longitude
 
 				if (phi < 0) {
-					float3 object_pos = mul(unity_ObjectToWorld, float4(0, 0, 0, 1));
+					float3 object_pos = mul(unity_ObjectToWorld, float4(0, _HeightOffset, 0, 1));
 					float3 camera_local_pos = i.cam_pos - object_pos;
+					camera_local_pos.y = max(camera_local_pos.y, 0.01); // don't allow looking under water surface; it renders backwards.
 					float3 surface_pos = float3 (
 						camera_local_pos.x - camera_local_pos.y / (dir.y / dir.x),
 						0,
@@ -189,7 +191,6 @@
 					dir = reflect(dir, water_normal);
 					phi = asin(dir.y);
 					water_mod = dot(dir, water_normal);
-					// water_reflection = 1;
 				}
 
 				float3 col = sky(dir, theta, phi, sun_dir);