diff --git a/Source/Core/Editing/EditMode.cs b/Source/Core/Editing/EditMode.cs
index 96354956..35d018cf 100644
--- a/Source/Core/Editing/EditMode.cs
+++ b/Source/Core/Editing/EditMode.cs
@@ -150,6 +150,9 @@ namespace CodeImp.DoomBuilder.Editing
 
 			//mxd. Show hints for this mode
 			General.Hints.ShowHints(this.GetType(), HintsManager.GENERAL);
+
+			//mxd. Display new mode name
+			General.Interface.HideInfo();
 		}
 
 		// Mode disengages
diff --git a/Source/Core/General/General.cs b/Source/Core/General/General.cs
index e9cb7622..67ac90ef 100644
--- a/Source/Core/General/General.cs
+++ b/Source/Core/General/General.cs
@@ -541,8 +541,6 @@ namespace CodeImp.DoomBuilder
 		[STAThread]
 		internal static void Main(string[] args)
 		{
-			Uri localpath;
-			
 			// Determine states
 			#if DEBUG
 				debugbuild = true;
@@ -571,7 +569,7 @@ namespace CodeImp.DoomBuilder
 			thisasm = Assembly.GetExecutingAssembly();
 			
 			// Find application path
-			localpath = new Uri(Path.GetDirectoryName(thisasm.GetName().CodeBase));
+			Uri localpath = new Uri(Path.GetDirectoryName(thisasm.GetName().CodeBase));
 			apppath = Uri.UnescapeDataString(localpath.AbsolutePath);
 			
 			// Setup directories
diff --git a/Source/Core/Windows/MainForm.cs b/Source/Core/Windows/MainForm.cs
index 5ac64f1d..f8f22b95 100644
--- a/Source/Core/Windows/MainForm.cs
+++ b/Source/Core/Windows/MainForm.cs
@@ -2999,7 +2999,7 @@ namespace CodeImp.DoomBuilder.Windows
 
 			//create path
 			string date = DateTime.Now.ToString("yyyy.MM.dd HH-mm-ss.fff");
-			string revision = "R" + General.ThisAssembly.GetName().Version.MinorRevision;
+			string revision = (General.DebugBuild ? "DEVBUILD" : "R" + General.ThisAssembly.GetName().Version.MinorRevision);
 			string path = Path.Combine(folder, name + date + " [" + revision + "].jpg");
 
 			//save image
diff --git a/Source/Plugins/BuilderEffects/BuilderEffects.csproj b/Source/Plugins/BuilderEffects/BuilderEffects.csproj
index 0827ef13..c89044d5 100644
--- a/Source/Plugins/BuilderEffects/BuilderEffects.csproj
+++ b/Source/Plugins/BuilderEffects/BuilderEffects.csproj
@@ -141,6 +141,9 @@
       <Private>False</Private>
     </ProjectReference>
   </ItemGroup>
+  <ItemGroup>
+    <None Include="Resources\Folder.png" />
+  </ItemGroup>
   <Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
   <!-- To modify your build process, add your task inside one of the targets below and uncomment it. 
        Other similar extension points exist, see Microsoft.Common.targets.
diff --git a/Source/Plugins/BuilderEffects/Interface/ObjImportSettingsForm.Designer.cs b/Source/Plugins/BuilderEffects/Interface/ObjImportSettingsForm.Designer.cs
index 9e280e21..a9cda345 100644
--- a/Source/Plugins/BuilderEffects/Interface/ObjImportSettingsForm.Designer.cs
+++ b/Source/Plugins/BuilderEffects/Interface/ObjImportSettingsForm.Designer.cs
@@ -30,7 +30,6 @@
 			this.cancel = new System.Windows.Forms.Button();
 			this.import = new System.Windows.Forms.Button();
 			this.label1 = new System.Windows.Forms.Label();
-			this.browse = new System.Windows.Forms.Button();
 			this.tbImportPath = new System.Windows.Forms.TextBox();
 			this.label3 = new System.Windows.Forms.Label();
 			this.axisx = new System.Windows.Forms.RadioButton();
@@ -38,6 +37,8 @@
 			this.axisz = new System.Windows.Forms.RadioButton();
 			this.panel1 = new System.Windows.Forms.Panel();
 			this.openFileDialog = new System.Windows.Forms.OpenFileDialog();
+			this.cbusevertexheight = new System.Windows.Forms.CheckBox();
+			this.browse = new System.Windows.Forms.Button();
 			((System.ComponentModel.ISupportInitialize)(this.nudScale)).BeginInit();
 			this.panel1.SuspendLayout();
 			this.SuspendLayout();
@@ -78,7 +79,7 @@
 			// 
 			this.cancel.Anchor = ((System.Windows.Forms.AnchorStyles)((System.Windows.Forms.AnchorStyles.Bottom | System.Windows.Forms.AnchorStyles.Right)));
 			this.cancel.DialogResult = System.Windows.Forms.DialogResult.Cancel;
-			this.cancel.Location = new System.Drawing.Point(279, 82);
+			this.cancel.Location = new System.Drawing.Point(226, 82);
 			this.cancel.Name = "cancel";
 			this.cancel.Size = new System.Drawing.Size(75, 23);
 			this.cancel.TabIndex = 14;
@@ -89,7 +90,7 @@
 			// import
 			// 
 			this.import.Anchor = ((System.Windows.Forms.AnchorStyles)((System.Windows.Forms.AnchorStyles.Bottom | System.Windows.Forms.AnchorStyles.Right)));
-			this.import.Location = new System.Drawing.Point(360, 82);
+			this.import.Location = new System.Drawing.Point(307, 82);
 			this.import.Name = "import";
 			this.import.Size = new System.Drawing.Size(75, 23);
 			this.import.TabIndex = 13;
@@ -106,16 +107,6 @@
 			this.label1.TabIndex = 12;
 			this.label1.Text = "Path:";
 			// 
-			// browse
-			// 
-			this.browse.Location = new System.Drawing.Point(360, 10);
-			this.browse.Name = "browse";
-			this.browse.Size = new System.Drawing.Size(75, 23);
-			this.browse.TabIndex = 11;
-			this.browse.Text = "Browse...";
-			this.browse.UseVisualStyleBackColor = true;
-			this.browse.Click += new System.EventHandler(this.browse_Click);
-			// 
 			// tbImportPath
 			// 
 			this.tbImportPath.Location = new System.Drawing.Point(55, 12);
@@ -182,13 +173,34 @@
 			this.openFileDialog.Filter = "Wavefront obj files|*.obj";
 			this.openFileDialog.Title = "Choose .obj file to import:";
 			// 
+			// cbusevertexheight
+			// 
+			this.cbusevertexheight.AutoSize = true;
+			this.cbusevertexheight.Location = new System.Drawing.Point(55, 64);
+			this.cbusevertexheight.Name = "cbusevertexheight";
+			this.cbusevertexheight.Size = new System.Drawing.Size(95, 17);
+			this.cbusevertexheight.TabIndex = 22;
+			this.cbusevertexheight.Text = "Sloped Terrian";
+			this.cbusevertexheight.UseVisualStyleBackColor = true;
+			// 
+			// browse
+			// 
+			this.browse.Image = global::CodeImp.DoomBuilder.BuilderEffects.Properties.Resources.Folder;
+			this.browse.Location = new System.Drawing.Point(360, 10);
+			this.browse.Name = "browse";
+			this.browse.Size = new System.Drawing.Size(28, 23);
+			this.browse.TabIndex = 11;
+			this.browse.UseVisualStyleBackColor = true;
+			this.browse.Click += new System.EventHandler(this.browse_Click);
+			// 
 			// ObjImportSettingsForm
 			// 
 			this.AcceptButton = this.import;
 			this.AutoScaleDimensions = new System.Drawing.SizeF(96F, 96F);
 			this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Dpi;
 			this.CancelButton = this.cancel;
-			this.ClientSize = new System.Drawing.Size(447, 109);
+			this.ClientSize = new System.Drawing.Size(394, 109);
+			this.Controls.Add(this.cbusevertexheight);
 			this.Controls.Add(this.panel1);
 			this.Controls.Add(this.label3);
 			this.Controls.Add(this.label2);
@@ -202,6 +214,7 @@
 			this.MaximizeBox = false;
 			this.MinimizeBox = false;
 			this.Name = "ObjImportSettingsForm";
+			this.Opacity = 1;
 			this.ShowIcon = false;
 			this.ShowInTaskbar = false;
 			this.Text = "Import Wavefront .obj";
@@ -228,5 +241,6 @@
 		private System.Windows.Forms.RadioButton axisz;
 		private System.Windows.Forms.Panel panel1;
 		private System.Windows.Forms.OpenFileDialog openFileDialog;
+		private System.Windows.Forms.CheckBox cbusevertexheight;
 	}
 }
\ No newline at end of file
diff --git a/Source/Plugins/BuilderEffects/Interface/ObjImportSettingsForm.cs b/Source/Plugins/BuilderEffects/Interface/ObjImportSettingsForm.cs
index 94156cce..b780a183 100644
--- a/Source/Plugins/BuilderEffects/Interface/ObjImportSettingsForm.cs
+++ b/Source/Plugins/BuilderEffects/Interface/ObjImportSettingsForm.cs
@@ -14,6 +14,7 @@ namespace CodeImp.DoomBuilder.BuilderEffects
 		#region ================== Variables
 
 		private ImportObjAsTerrainMode.UpAxis axis;
+		private bool slopessupported;
 
 		#endregion
 
@@ -22,6 +23,7 @@ namespace CodeImp.DoomBuilder.BuilderEffects
 		internal string FilePath { get { return tbImportPath.Text.Trim(); } }
 		internal ImportObjAsTerrainMode.UpAxis UpAxis { get { return axis; } }
 		internal float ObjScale { get { return (float)nudScale.Value; } }
+		internal bool UseVertexHeights { get { return slopessupported && cbusevertexheight.Checked; } }
 
 		//todo: floor/ceiling textures? height offsets? ceiling extra height?
 
@@ -34,6 +36,11 @@ namespace CodeImp.DoomBuilder.BuilderEffects
 			//restore settings
 			axis = (ImportObjAsTerrainMode.UpAxis)General.Settings.ReadPluginSetting("objexportupaxis", 0);
 			nudScale.Value = (decimal)General.Settings.ReadPluginSetting("objexportscale", 1.0f);
+			slopessupported = (General.Map.UDMF || General.Map.Data.GetThingInfoEx(ImportObjAsTerrainMode.VERTEX_HEIGHT_THING_TYPE) != null);
+			if(slopessupported) 
+				cbusevertexheight.Checked = General.Settings.ReadPluginSetting("objusevertexheights", true);
+			else 
+				cbusevertexheight.Enabled = false;
 
 			switch(axis) 
 			{
@@ -69,6 +76,7 @@ namespace CodeImp.DoomBuilder.BuilderEffects
 			//save settings
 			General.Settings.WritePluginSetting("objexportupaxis", (int)axis);
 			General.Settings.WritePluginSetting("objexportscale", (float)nudScale.Value);
+			if(slopessupported) General.Settings.WritePluginSetting("objusevertexheights", cbusevertexheight.Checked);
 
 			this.DialogResult = DialogResult.OK;
 			this.Close();
diff --git a/Source/Plugins/BuilderEffects/Modes/ImportObjAsTerrainMode.cs b/Source/Plugins/BuilderEffects/Modes/ImportObjAsTerrainMode.cs
index b432b5f4..3612aaa8 100644
--- a/Source/Plugins/BuilderEffects/Modes/ImportObjAsTerrainMode.cs
+++ b/Source/Plugins/BuilderEffects/Modes/ImportObjAsTerrainMode.cs
@@ -25,6 +25,7 @@ namespace CodeImp.DoomBuilder.BuilderEffects
 
 		private readonly static char[] space = { ' ' };
 		private const string slash = "/";
+		internal const int VERTEX_HEIGHT_THING_TYPE = 1504;
 
 		#endregion
 
@@ -72,12 +73,6 @@ namespace CodeImp.DoomBuilder.BuilderEffects
 
 		public override void OnEngage() 
 		{
-			if(!General.Map.UDMF) 
-			{
-				General.Interface.DisplayStatus(StatusType.Warning, "Terrain importer works only in UDMF map format!");
-				OnCancel();
-			}
-
 			base.OnEngage();
 			General.Map.Map.ClearAllSelected();
 
@@ -104,7 +99,7 @@ namespace CodeImp.DoomBuilder.BuilderEffects
 			int maxZ = int.MinValue;
 
 			// Read .obj, create and select sectors 
-			if(!ReadGeometry(form.FilePath, form.ObjScale, form.UpAxis, verts, faces, ref minZ, ref maxZ) || !CreateGeometry(verts, faces, minZ, maxZ + (maxZ - minZ)/2)) 
+			if(!ReadGeometry(form.FilePath, form.ObjScale, form.UpAxis, verts, faces, ref minZ, ref maxZ) || !CreateGeometry(verts, faces, maxZ + (maxZ - minZ)/2)) 
 			{
 				// Fial!
 				Cursor.Current = Cursors.Default;
@@ -114,9 +109,14 @@ namespace CodeImp.DoomBuilder.BuilderEffects
 			}
 			
 			// Update caches
+			General.Map.Map.SnapAllToAccuracy();
+			General.Map.Map.UpdateConfiguration();
 			General.Map.Map.Update();
 			General.Map.IsChanged = true;
 
+			// Update things filter so that it includes added things
+			if(form.UseVertexHeights && !General.Map.UDMF) General.Map.ThingsFilter.Update();
+
 			// Done
 			Cursor.Current = Cursors.Default;
 
@@ -137,29 +137,80 @@ namespace CodeImp.DoomBuilder.BuilderEffects
 
 		#region ================== Geometry creation
 
-		private static bool CreateGeometry(List<Vector3D> verts, List<Face> faces, int minZ, int maxZ) 
+		private bool CreateGeometry(List<Vector3D> verts, List<Face> faces, int maxZ) 
 		{
+			MapSet map = General.Map.Map;
+			
+			// Capacity checks
+			int totalverts = map.Vertices.Count + verts.Count;
+			int totalsides = map.Sidedefs.Count + faces.Count * 6;
+			int totallines = map.Linedefs.Count + faces.Count * 3;
+			int totalsectors = map.Sectors.Count + faces.Count;
+			int totalthings = 0;
+			if(form.UseVertexHeights && !General.Map.UDMF) 
+			{
+				// We'll use vertex height things in non-udmf maps, if such things are defined in Game Configuration
+				totalthings = map.Things.Count + verts.Count;
+			}
+
+			if(totalverts > General.Map.FormatInterface.MaxVertices) 
+			{
+				MessageBox.Show("Cannot import the model: resulting vertex count (" + totalverts 
+					+ ") is larger than map format's maximum (" + General.Map.FormatInterface.MaxVertices + ")!", 
+					"Terrain Importer", MessageBoxButtons.OK, MessageBoxIcon.Error);
+				return false;
+			}
+			if(totalsides > General.Map.FormatInterface.MaxSidedefs) 
+			{
+				MessageBox.Show("Cannot import the model: resulting sidedefs count (" + totalsides 
+					+ ") is larger than map format's maximum (" + General.Map.FormatInterface.MaxSidedefs + ")!", 
+					"Terrain Importer", MessageBoxButtons.OK, MessageBoxIcon.Error);
+				return false;
+			}
+			if(totallines > General.Map.FormatInterface.MaxLinedefs) 
+			{
+				MessageBox.Show("Cannot import the model: resulting sidedefs count (" + totallines 
+					+ ") is larger than map format's maximum (" + General.Map.FormatInterface.MaxLinedefs + ")!", 
+					"Terrain Importer", MessageBoxButtons.OK, MessageBoxIcon.Error);
+				return false;
+			}
+			if(totalsectors > General.Map.FormatInterface.MaxSectors) 
+			{
+				MessageBox.Show("Cannot import the model: resulting sidedefs count (" + totalsectors 
+					+ ") is larger than map format's maximum (" + General.Map.FormatInterface.MaxSectors + ")!", 
+					"Terrain Importer", MessageBoxButtons.OK, MessageBoxIcon.Error);
+				return false;
+			}
+			if(totalthings > General.Map.FormatInterface.MaxThings) 
+			{
+				MessageBox.Show("Cannot import the model: resulting things count (" + totalthings
+					+ ") is larger than map format's maximum (" + General.Map.FormatInterface.MaxThings + ")!",
+					"Terrain Importer", MessageBoxButtons.OK, MessageBoxIcon.Error);
+				return false;
+			}
+			
 			//make undo
 			General.Map.UndoRedo.CreateUndo("Import Terrain");
 
 			//prepare mapset
 			List<Linedef> newlines = new List<Linedef>();
-			MapSet map = General.Map.Map;
 			map.BeginAddRemove();
-			map.SetCapacity(map.Vertices.Count + verts.Count, map.Linedefs.Count + faces.Count * 3, map.Sidedefs.Count + faces.Count * 3, map.Sectors.Count + faces.Count, 0);
+			map.SetCapacity(totalverts, totallines, totalsides, totalsectors, totalthings);
 
 			//terrain has many faces... let's create them
 			Dictionary<Vector3D, Vertex> newverts = new Dictionary<Vector3D, Vertex>();
 			foreach(Face face in faces)
 			{
+				// Create sector
 				Sector s = map.CreateSector();
 				s.Selected = true;
-				s.FloorHeight = minZ;
+				s.FloorHeight = (int)Math.Round((face.V1.z + face.V2.z + face.V3.z) / 3);
 				s.CeilHeight = maxZ;
 				s.Brightness = General.Settings.DefaultBrightness; //todo: allow user to change this
 				s.SetCeilTexture(General.Map.Config.SkyFlatName);
 				s.SetFloorTexture(General.Map.Options.DefaultFloorTexture); //todo: allow user to change this
 
+				// And linedefs
 				Linedef newline = GetLine(newverts, s, face.V1, face.V2);
 				if(newline != null) newlines.Add(newline);
 
@@ -172,6 +223,19 @@ namespace CodeImp.DoomBuilder.BuilderEffects
 				s.UpdateCache();
 			}
 
+			// Add slope things
+			if(form.UseVertexHeights && !General.Map.UDMF) 
+			{
+				foreach (Vector3D pos in newverts.Keys) 
+				{
+					Thing t = map.CreateThing();
+					General.Settings.ApplyDefaultThingSettings(t);
+					t.Type = VERTEX_HEIGHT_THING_TYPE;
+					t.Move(pos);
+					t.Selected = true;
+				}
+			}
+
 			//update new lines
 			foreach(Linedef l in newlines) l.ApplySidedFlags();
 
@@ -179,7 +243,7 @@ namespace CodeImp.DoomBuilder.BuilderEffects
 			return true;
 		}
 
-		private static Linedef GetLine(Dictionary<Vector3D, Vertex> verts, Sector sector, Vector3D v1, Vector3D v2) 
+		private Linedef GetLine(Dictionary<Vector3D, Vertex> verts, Sector sector, Vector3D v1, Vector3D v2) 
 		{
 			Linedef line = null;
 
@@ -198,31 +262,33 @@ namespace CodeImp.DoomBuilder.BuilderEffects
 			}
 
 			//create a new line?
+			Sidedef side;
 			if(line == null) 
 			{
 				line = General.Map.Map.CreateLinedef(start, end);
 
 				//create front sidedef and attach sector to it
-				General.Map.Map.CreateSidedef(line, true, sector);
+				side = General.Map.Map.CreateSidedef(line, true, sector);
 			} 
 			else 
 			{
 				//create back sidedef and attach sector to it
-				General.Map.Map.CreateSidedef(line, false, sector);
+				side = General.Map.Map.CreateSidedef(line, false, sector);
 			}
 
+			if(!form.UseVertexHeights) side.SetTextureLow(General.Map.Options.DefaultWallTexture);
 			line.Selected = true;
 			return line;
 		}
 
-		private static Vertex GetVertex(Dictionary<Vector3D, Vertex> verts, Vector3D pos) 
+		private Vertex GetVertex(Dictionary<Vector3D, Vertex> verts, Vector3D pos) 
 		{
 			//already there?
 			if(verts.ContainsKey(pos)) return verts[pos];
 			
 			//make a new one
 			Vertex v = General.Map.Map.CreateVertex(pos);
-			v.ZFloor = pos.z;
+			if(form.UseVertexHeights) v.ZFloor = pos.z;
 			verts.Add(pos, v);
 			return v;
 		}
diff --git a/Source/Plugins/BuilderEffects/Properties/Resources.Designer.cs b/Source/Plugins/BuilderEffects/Properties/Resources.Designer.cs
index c987373e..77bc59c4 100644
--- a/Source/Plugins/BuilderEffects/Properties/Resources.Designer.cs
+++ b/Source/Plugins/BuilderEffects/Properties/Resources.Designer.cs
@@ -1,7 +1,7 @@
 //------------------------------------------------------------------------------
 // <auto-generated>
 //     This code was generated by a tool.
-//     Runtime Version:2.0.50727.4927
+//     Runtime Version:2.0.50727.5466
 //
 //     Changes to this file may cause incorrect behavior and will be lost if
 //     the code is regenerated.
@@ -60,6 +60,13 @@ namespace CodeImp.DoomBuilder.BuilderEffects.Properties {
             }
         }
         
+        internal static System.Drawing.Bitmap Folder {
+            get {
+                object obj = ResourceManager.GetObject("Folder", resourceCulture);
+                return ((System.Drawing.Bitmap)(obj));
+            }
+        }
+        
         internal static System.Drawing.Bitmap Jitter {
             get {
                 object obj = ResourceManager.GetObject("Jitter", resourceCulture);
diff --git a/Source/Plugins/BuilderEffects/Properties/Resources.resx b/Source/Plugins/BuilderEffects/Properties/Resources.resx
index 54c9ead1..7d1cece6 100644
--- a/Source/Plugins/BuilderEffects/Properties/Resources.resx
+++ b/Source/Plugins/BuilderEffects/Properties/Resources.resx
@@ -118,13 +118,16 @@
     <value>System.Resources.ResXResourceWriter, System.Windows.Forms, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
   </resheader>
   <assembly alias="System.Windows.Forms" name="System.Windows.Forms, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" />
+  <data name="Terrain" type="System.Resources.ResXFileRef, System.Windows.Forms">
+    <value>..\Resources\Terrain.png;System.Drawing.Bitmap, System.Drawing, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a</value>
+  </data>
   <data name="Jitter" type="System.Resources.ResXFileRef, System.Windows.Forms">
     <value>..\Resources\Jitter.png;System.Drawing.Bitmap, System.Drawing, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a</value>
   </data>
   <data name="Update" type="System.Resources.ResXFileRef, System.Windows.Forms">
     <value>..\Resources\Update.png;System.Drawing.Bitmap, System.Drawing, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a</value>
   </data>
-  <data name="Terrain" type="System.Resources.ResXFileRef, System.Windows.Forms">
-    <value>..\Resources\Terrain.png;System.Drawing.Bitmap, System.Drawing, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a</value>
+  <data name="Folder" type="System.Resources.ResXFileRef, System.Windows.Forms">
+    <value>..\Resources\Folder.png;System.Drawing.Bitmap, System.Drawing, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a</value>
   </data>
 </root>
\ No newline at end of file
diff --git a/Source/Plugins/BuilderEffects/Resources/Folder.png b/Source/Plugins/BuilderEffects/Resources/Folder.png
new file mode 100644
index 00000000..1d415fd6
Binary files /dev/null and b/Source/Plugins/BuilderEffects/Resources/Folder.png differ
diff --git a/Source/Plugins/BuilderModes/VisualModes/BaseVisualThing.cs b/Source/Plugins/BuilderModes/VisualModes/BaseVisualThing.cs
index 73b53de1..41f0c6d1 100644
--- a/Source/Plugins/BuilderModes/VisualModes/BaseVisualThing.cs
+++ b/Source/Plugins/BuilderModes/VisualModes/BaseVisualThing.cs
@@ -230,10 +230,11 @@ namespace CodeImp.DoomBuilder.BuilderModes
 				if(Thing.Sector != null)
 				{
 					SectorData sd = mode.GetSectorData(Thing.Sector);
-					if(Thing.Position.z > 0)
+					pos.z = sd.Ceiling.plane.GetZ(Thing.Position) - info.Height;
+					/*if(Thing.Position.z > 0)
 						pos.z = sd.Ceiling.plane.GetZ(Thing.Position) - info.Height;
 					else
-						pos.z = Thing.Sector.CeilHeight - info.Height; //mxd. was [pos.z = Thing.Sector.CeilHeight;]
+						pos.z = Thing.Sector.CeilHeight - info.Height;*/
 				}
 
 				pos.z -= Thing.Position.z;
@@ -252,10 +253,11 @@ namespace CodeImp.DoomBuilder.BuilderModes
 				if(Thing.Sector != null)
 				{
 					SectorData sd = mode.GetSectorData(Thing.Sector);
-					if(Thing.Position.z == 0)
+					pos.z = sd.Floor.plane.GetZ(Thing.Position);
+					/*if(Thing.Position.z == 0)
 						pos.z = sd.Floor.plane.GetZ(Thing.Position);
 					else
-						pos.z = Thing.Sector.FloorHeight;
+						pos.z = Thing.Sector.FloorHeight;*/
 				}
 
 				pos.z += Thing.Position.z;