Updates to the DefaultProject template

Removes raytracingschenesrg.srgi
Updates to the root scenesrg.srgi (to match AtomSampleViewer)
Adds a SceneSrg.azsli and a README to the template

Templates/DefaultProject/Template/ShaderLib/README.md

@@ -0,0 +1,5 @@
+# Customizing Shader Resource Groups
+
+Please read:  
+*\<engine\>/Gems/Atom/Feature/Common/Assets/ShaderResourceGroups/README.md*  
+for details on how to customize scenesrg.srgi and viewsrg.srgi.  

Templates/DefaultProject/Template/ShaderLib/raytracingscenesrg.srgi

@@ -1,30 +0,0 @@
-// {BEGIN_LICENSE}
-/*
-* All or portions of this file Copyright (c) Amazon.com, Inc. or its affiliates or
-* its licensors.
-*
-* For complete copyright and license terms please see the LICENSE at the root of this
-* distribution (the "License"). All use of this software is governed by the License,
-* or, if provided, by the license below or the license accompanying this file. Do not
-* remove or modify any license notices. This file is distributed on an "AS IS" BASIS,
-* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-*
-*/
-// {END_LICENSE}
-
-#pragma once
-
-// Please read README.md for an explanation on why scenesrg.srgi and viewsrg.srgi are
-// located in this folder (And how you can optionally customize your own scenesrg.srgi
-// and viewsrg.srgi in your game project).
-
-#include <Atom/Features/SrgSemantics.azsli>
-
-partial ShaderResourceGroup RayTracingSceneSrg : SRG_RayTracingScene
-{
-/* Intentionally Empty. Helps define the SrgSemantic for RayTracingSceneSrg once.*/
-};
-
-#define AZ_COLLECTING_PARTIAL_SRGS
-#include <Atom/Feature/Common/Assets/ShaderResourceGroups/RayTracingSceneSrgAll.azsli>
-#undef AZ_COLLECTING_PARTIAL_SRGS

Templates/DefaultProject/Template/ShaderLib/scenesrg.srgi

@@ -26,5 +26,6 @@ partial ShaderResourceGroup SceneSrg : SRG_PerScene
 };
 
 #define AZ_COLLECTING_PARTIAL_SRGS
-#include <Atom/Feature/Common/Assets/ShaderResourceGroups/SceneSrgAll.azsli>
+#include <Shaders/ShaderResourceGroups/SceneSrg.azsli>
+#include <Atom/Feature/Common/Assets/ShaderResourceGroups/SceneSrg.azsli>
 #undef AZ_COLLECTING_PARTIAL_SRGS

Templates/DefaultProject/Template/Shaders/ShaderResourceGroups/SceneSrg.azsli

@@ -0,0 +1,24 @@
+// {BEGIN_LICENSE}
+/*
+* All or portions of this file Copyright (c) Amazon.com, Inc. or its affiliates or
+* its licensors.
+*
+* For complete copyright and license terms please see the LICENSE at the root of this
+* distribution (the "License"). All use of this software is governed by the License,
+* or, if provided, by the license below or the license accompanying this file. Do not
+* remove or modify any license notices. This file is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+*
+*/
+// {END_LICENSE}
+
+#ifndef AZ_COLLECTING_PARTIAL_SRGS
+#error Do not include this file directly. Include the main .srgi file instead.
+#endif
+
+partial ShaderResourceGroup SceneSrg
+{
+    float m_time;
+    float m_deltaTime;
+}
+

Templates/DefaultProject/template.json

@@ -577,10 +577,10 @@
             "isOptional": false
         },
         {
-            "file": "ShaderLib/raytracingscenesrg.srgi",
+            "file": "ShaderLib/README.md",
-            "origin": "ShaderLib/raytracingscenesrg.srgi",
+            "origin": "ShaderLib/README.md",
             "isTemplated": true,
-            "isOptional": false
+            "isOptional": true
         },
         {
             "file": "ShaderLib/scenesrg.srgi",
@@ -600,6 +600,12 @@
             "isTemplated": true,
             "isOptional": false
         },
+        {
+            "file": "Shaders/ShaderResourceGroups/SceneSrg.azsli",
+            "origin": "Shaders/ShaderResourceGroups/SceneSrg.azsli",
+            "isTemplated": true,
+            "isOptional": false
+        },
         {
             "file": "autoexec.cfg",
             "origin": "autoexec.cfg",