* Update levelAsset creation so it can be flagged to be creating a subScene preemptively, improving workflow when creating a SubScene level asset 'in place' via the inspector.

* Fixed issue of creating new SubScene using the full level template instead of a blank level file
* Fixed subScene inspector field handling so clicking the create new will mark the 'in place' created level asset as a subscene appropriately
* Changed up persistenceManager logic when parsing objects out - especially with specialty fields - to use Strings instead of const char* to simplify memory juggling and improve stability
* Rolled back specialty array field outputs for decal roads and convex shapes to have the field names in the output again
* Added sanity check for MeshRoad's when writing out via specialty array field to ensure there are profile nodes before trying to write any
* Added sanity check to avoid pointlessly writing out meshroad and river position field into subScene file as it could cause a transform double-up and cause them to move when loading from a subscene

Engine/source/T3D/SubScene.cpp

@@ -3,6 +3,8 @@
 #include "gameMode.h"
 #include "console/persistenceManager.h"
 #include "console/script.h"
+#include "environment/meshRoad.h"
+#include "environment/river.h"
 #include "scene/sceneRenderState.h"
 #include "renderInstance/renderPassManager.h"
 #include "gfx/gfxDrawUtil.h"
@@ -29,7 +31,8 @@ SubScene::SubScene() :
    mFreezeLoading(false),
    mTickPeriodMS(1000),
    mCurrTick(0),
-   mGlobalLayer(false)
+   mGlobalLayer(false),
+   mSaving(false)
 {
    mNetFlags.set(Ghostable | ScopeAlways);
 
@@ -65,6 +68,7 @@ void SubScene::initPersistFields()
    addGroup("SubScene");
    addField("isGlobalLayer", TypeBool, Offset(mGlobalLayer, SubScene), "");
    INITPERSISTFIELD_LEVELASSET(Level, SubScene, "The level asset to load.");
+   addField("tickPeriodMS", TypeS32, Offset(mTickPeriodMS, SubScene), "evaluation rate (ms)");
    addField("gameModes", TypeGameModeList, Offset(mGameModesNames, SubScene), "The game modes that this subscene is associated with.");
    endGroup("SubScene");
 
@@ -263,6 +267,9 @@ void SubScene::_onFileChanged(const Torque::Path& path)
    if(mLevelAsset.isNull() || Torque::Path(mLevelAsset->getLevelPath()) != path)
       return;
 
+   if (mSaving)
+      return;
+
    AssertFatal(path == mLevelAsset->getLevelPath(), "Prefab::_onFileChanged - path does not match filename.");
 
    _closeFile(false);
@@ -336,6 +343,9 @@ void SubScene::load()
    if (mFreezeLoading)
       return;
 
+   if (mSaving)
+      return;
+
    _loadFile(true);
    mLoaded = true;
 
@@ -362,6 +372,9 @@ void SubScene::unload()
    if (mFreezeLoading)
       return;
 
+   if (mSaving)
+      return;
+
    if (isSelected())
    {
       mStartUnloadTimerMS = Sim::getCurrentTime();
@@ -421,10 +434,15 @@ bool SubScene::save()
    if (mLevelAsset.isNull())
       return false;
 
+   if (mSaving)
+      return false;
+
    //If we're flagged for unload, push back the unload timer so we can't accidentally trip be saving partway through an unload
    if (mStartUnloadTimerMS != -1)
       mStartUnloadTimerMS = Sim::getCurrentTime();
 
+   mSaving = true;
+
    PersistenceManager prMger;
 
    StringTableEntry levelPath = mLevelAsset->getLevelPath();
@@ -449,6 +467,11 @@ bool SubScene::save()
             prMger.setDirty((*itr), levelPath);
          }
       }
+
+      if(dynamic_cast<MeshRoad*>(childObj) || dynamic_cast<River*>(childObj))
+      {
+         prMger.addRemoveField(childObj, "position");
+      }
    }
 
    prMger.saveDirty();
@@ -466,6 +489,8 @@ bool SubScene::save()
    //Finally, save
    saveSuccess = mLevelAsset->saveAsset();
 
+   mSaving = false;
+
    return saveSuccess;
 }