Kinda ok ish looking transition!

Assets/Scenes/Jason.unity

@@ -26,7 +26,7 @@ RenderSettings:
   m_AmbientIntensity: 1
   m_AmbientMode: 3
   m_SubtractiveShadowColor: {r: 0.42, g: 0.478, b: 0.627, a: 1}
-  m_SkyboxMaterial: {fileID: 0}
+  m_SkyboxMaterial: {fileID: 2100000, guid: 369b9ebe3a62b904dbc19bd332b44086, type: 2}
   m_HaloStrength: 0.5
   m_FlareStrength: 1
   m_FlareFadeSpeed: 3
@@ -38,7 +38,7 @@ RenderSettings:
   m_ReflectionIntensity: 1
   m_CustomReflection: {fileID: 0}
   m_Sun: {fileID: 0}
-  m_IndirectSpecularColor: {r: 0, g: 0, b: 0, a: 1}
+  m_IndirectSpecularColor: {r: 0.010486943, g: 0.05298245, b: 0.15319028, a: 1}
   m_UseRadianceAmbientProbe: 0
 --- !u!157 &3
 LightmapSettings:
@@ -7656,7 +7656,7 @@ GameObject:
   m_Icon: {fileID: 0}
   m_NavMeshLayer: 0
   m_StaticEditorFlags: 0
-  m_IsActive: 1
+  m_IsActive: 0
 --- !u!4 &813119609
 Transform:
   m_ObjectHideFlags: 0
@@ -10750,7 +10750,7 @@ GameObject:
   m_Icon: {fileID: 0}
   m_NavMeshLayer: 0
   m_StaticEditorFlags: 0
-  m_IsActive: 1
+  m_IsActive: 0
 --- !u!4 &1083674222
 Transform:
   m_ObjectHideFlags: 0
@@ -13443,22 +13443,22 @@ MonoBehaviour:
   m_Script: {fileID: 11500000, guid: 02e217105518e1f418b52195b8b328d7, type: 3}
   m_Name: 
   m_EditorClassIdentifier: 
-  transitionDuration: 1.5
+  transitionDuration: 0.84
   transitionCurve:
     serializedVersion: 2
     m_Curve:
     - serializedVersion: 3
-      time: 0.21012497
+      time: 0
-      value: 0.023590088
+      value: 0
-      inSlope: 0
+      inSlope: 2
-      outSlope: 0
+      outSlope: 2
       tangentMode: 0
       weightedMode: 0
       inWeight: 0
       outWeight: 0
     - serializedVersion: 3
-      time: 0.82281494
+      time: 1
-      value: 0.99056625
+      value: 1
       inSlope: 0
       outSlope: 0
       tangentMode: 0
@@ -15814,7 +15814,7 @@ GameObject:
   m_Icon: {fileID: 0}
   m_NavMeshLayer: 0
   m_StaticEditorFlags: 0
-  m_IsActive: 1
+  m_IsActive: 0
 --- !u!4 &1655426232
 Transform:
   m_ObjectHideFlags: 0

Assets/Scripts/WorldSwitcher.cs

@@ -31,20 +31,23 @@ public class WorldSwitcher : MonoBehaviour {
 		for (int i = 0; i < worldInfos.Length; i++) {
 			worldInfos[i].material = worldInfos[i].renderQuad.GetComponent<Renderer>().material;
 
-			worldInfos[i].GenerateRenderTexture();
+			worldInfos[i].GenerateRenderTexture(quadOffset);
 		}
 		
 		ResetQuadPositions();
 	}
 
 	public void SwitchWorld(bool right) {
+		if (transition != null)
+			return;
+		
 		if (right ? currentWorldIndex == worldInfos.Length - 1 : currentWorldIndex == 0)
 			return;
 
 		//TODO Block window resize during transition?
 		foreach (WorldInfo worldInfo in worldInfos) {
 			if (Screen.width != worldInfo.texture.width || Screen.height != worldInfo.texture.height)
-				worldInfo.GenerateRenderTexture();
+				worldInfo.GenerateRenderTexture(quadOffset);
 		}
 
 		lastWorldIndex = currentWorldIndex;
@@ -74,7 +77,7 @@ public class WorldSwitcher : MonoBehaviour {
 			float t = transitionCurve.Evaluate((Time.time - startTime) / transitionDuration);
 			
 			newWorld.renderQuad.position = GetQuadOffset(lastCam, newWorld, currentWorldIndex, fromRight, t);
-			newWorld.material.SetFloat(UVOffset, fromRight ? 1f - t - tabWidth : -1f + t + tabWidth);
+			newWorld.material.SetFloat(UVOffset, GetUVOffset(t, fromRight, currentWorldIndex));
 
 			yield return null;
 		}
@@ -85,12 +88,22 @@ public class WorldSwitcher : MonoBehaviour {
 
 	Vector3 GetQuadOffset(Camera cam, WorldInfo worldInfo, int index, bool fromRight, float t = 0f) {
 		float x = fromRight ?
-			Mathf.Lerp(1f - tabWidth * (worldInfos.Length - index), 0f, t) :
+			Mathf.Lerp(1f - tabWidth * (worldInfos.Length - index), index * tabWidth, t) :
-			Mathf.Lerp(index * tabWidth, 1f, t);
+			Mathf.Lerp((1 + index) * tabWidth, 1f - (worldInfos.Length - 1 - index) * tabWidth, t);
 		Vector3 quadHalfWidthOffset = Vector3.right * (fromRight ? worldInfo.renderQuad.localScale.x / 2f : -worldInfo.renderQuad.localScale.x / 2f);
 
 		//TODO Offset epsilon
-		return cam.ViewportToWorldPoint(new Vector3(x, .5f, quadOffset - (t != 0 ? .01f : 0f))) + quadHalfWidthOffset;
+		return cam.ViewportToWorldPoint(new Vector3(
+			x,
+			.5f, 
+			quadOffset - Mathf.Abs(currentWorldIndex - index) * .01f)
+		) + quadHalfWidthOffset;
+	}
+
+	float GetUVOffset(float t, bool fromRight, int index) {
+		return fromRight ?
+			Mathf.Lerp(1f - tabWidth * (worldInfos.Length - index), index * tabWidth, t):
+			Mathf.Lerp(-1f + tabWidth * (index + 1), -(worldInfos.Length - 1 - index) * tabWidth, t);
 	}
 
 	void ResetQuadPositions() {
@@ -103,7 +116,7 @@ public class WorldSwitcher : MonoBehaviour {
 			if (usingRenderTexture) {
 				bool fromRight = i - currentWorldIndex > 0;
 				worldInfos[i].renderQuad.position = GetQuadOffset(currCam, worldInfos[i], i, fromRight);
-				worldInfos[i].material.SetFloat(UVOffset, fromRight ? 1f - tabWidth : -1f + tabWidth);
+				worldInfos[i].material.SetFloat(UVOffset, GetUVOffset(0f, fromRight, i));
 			}
 		}
 	}
@@ -127,11 +140,12 @@ struct WorldInfo {
 		}
 	}
 
-	public void GenerateRenderTexture() {
+	public void GenerateRenderTexture(float quadOffset) {
 		bool usingTexture = !ReferenceEquals(camera.targetTexture, null);
 		if (usingTexture)
 			camera.targetTexture = null;
 
+		//float height = 2f * Mathf.Atan(Mathf.Deg2Rad * camera.fieldOfView) * quadOffset;
 		renderQuad.localScale = new Vector3(camera.aspect, 1f, 1f);
 		texture = new RenderTexture(Screen.width, Screen.height, 32);
 		material.SetTexture(CameraTexture, texture);