diff --git a/Rendering/Renderable.cs b/Rendering/Renderable.cs
index 174204e..1e29636 100644
--- a/Rendering/Renderable.cs
+++ b/Rendering/Renderable.cs
@@ -386,6 +386,7 @@ namespace CodeWalker.Rendering
         public Vector4 WindOverrideParams { get; set; } = Vector4.One;
         public Vector4 globalAnimUV0 { get; set; } = Vector4.Zero;
         public Vector4 globalAnimUV1 { get; set; } = Vector4.Zero;
+        public Vector4 DirtDecalMask { get; set; } = Vector4.Zero;
         public bool SpecOnly { get; set; } = false;
         public float WaveOffset { get; set; } = 0; //for terrainfoam
         public float WaterHeight { get; set; } = 0; //for terrainfoam
@@ -583,6 +584,9 @@ namespace CodeWalker.Rendering
                             case MetaName.HeightOpacity:
                                 HeightOpacity = ((Vector4)param.Data).X;
                                 break;
+                            case MetaName.DirtDecalMask:
+                                DirtDecalMask = ((Vector4)param.Data);
+                                break;
                         }
 
                     }
diff --git a/Rendering/Shaders/BasicShader.cs b/Rendering/Shaders/BasicShader.cs
index e798c2d..cca0412 100644
--- a/Rendering/Shaders/BasicShader.cs
+++ b/Rendering/Shaders/BasicShader.cs
@@ -73,6 +73,7 @@ namespace CodeWalker.Rendering
         public float specularFresnel;
         public float wetnessMultiplier;
         public uint SpecOnly;
+        public Vector4 TextureAlphaMask;
     }
     public struct BasicShaderInstGlobalMatrix
     {
@@ -588,8 +589,11 @@ namespace CodeWalker.Rendering
             uint tintflag = 0;
             if (usetint) tintflag = 1;
 
+            Vector4 textureAlphaMask = Vector4.Zero;
+            uint decalflag = DecalMode ? 1u : 0u;
             uint windflag = geom.EnableWind ? 1u : 0u;
             uint emflag = geom.IsEmissive ? 1u : 0u;
+            uint pstintflag = tintflag;
             var shaderName = geom.DrawableGeom.Shader.Name;
             var shaderFile = geom.DrawableGeom.Shader.FileName;
             switch (shaderFile.Hash)
@@ -606,9 +610,12 @@ namespace CodeWalker.Rendering
                 case 2706821972://{mirror_decal.sps}
                     //if (RenderMode == WorldRenderMode.Default) usediff = false;
                     break;
+                case 2655725442://{decal_dirt.sps}
+                    textureAlphaMask = geom.DirtDecalMask;
+                    decalflag = 2;
+                    break;
             }
 
-            uint pstintflag = tintflag;
             if (VSEntityVars.Vars.IsInstanced>0)
             {
                 pstintflag = 1;
@@ -631,7 +638,7 @@ namespace CodeWalker.Rendering
             PSGeomVars.Vars.EnableNormalMap = usebump ? 1u : 0u;
             PSGeomVars.Vars.EnableSpecMap = usespec ? 1u : 0u;
             PSGeomVars.Vars.EnableDetailMap = usedetl ? 1u : 0u;
-            PSGeomVars.Vars.IsDecal = DecalMode ? 1u : 0u;
+            PSGeomVars.Vars.IsDecal = decalflag;
             PSGeomVars.Vars.IsEmissive = emflag;
             PSGeomVars.Vars.IsDistMap = isdistmap ? 1u : 0u;
             PSGeomVars.Vars.bumpiness = geom.bumpiness;
@@ -645,6 +652,7 @@ namespace CodeWalker.Rendering
             PSGeomVars.Vars.specularFresnel = geom.specularFresnel;
             PSGeomVars.Vars.wetnessMultiplier = geom.wetnessMultiplier;
             PSGeomVars.Vars.SpecOnly = geom.SpecOnly ? 1u : 0u;
+            PSGeomVars.Vars.TextureAlphaMask = textureAlphaMask;
             PSGeomVars.Update(context);
             PSGeomVars.SetPSCBuffer(context, 2);
 
@@ -752,6 +760,7 @@ namespace CodeWalker.Rendering
             PSGeomVars.Vars.specularFresnel = 1.0f;
             PSGeomVars.Vars.wetnessMultiplier = 0.0f;
             PSGeomVars.Vars.SpecOnly = 0;
+            PSGeomVars.Vars.TextureAlphaMask = Vector4.Zero;
             PSGeomVars.Update(context);
             PSGeomVars.SetPSCBuffer(context, 2);
 
diff --git a/Shaders/BasicPS.cso b/Shaders/BasicPS.cso
index c9d9284..70a6f78 100644
Binary files a/Shaders/BasicPS.cso and b/Shaders/BasicPS.cso differ
diff --git a/Shaders/BasicPS.hlsl b/Shaders/BasicPS.hlsl
index f55adfd..ca600f4 100644
--- a/Shaders/BasicPS.hlsl
+++ b/Shaders/BasicPS.hlsl
@@ -36,6 +36,7 @@ cbuffer PSGeomVars : register(b2)
     float specularFresnel;
     float wetnessMultiplier;
     uint SpecOnly;
+	float4 TextureAlphaMask;
 }
 
 
@@ -77,6 +78,12 @@ float4 main(VS_OUTPUT input) : SV_TARGET
         if ((IsDecal == 0) && (c.a <= 0.33)) discard;
         if ((IsDecal == 1) && (c.a <= 0.0)) discard;
         if(IsDecal==0) c.a = 1;
+		if (IsDecal == 2)
+		{
+			float4 mask = TextureAlphaMask * c;
+			c.a = saturate(mask.r + mask.g + mask.b + mask.a);
+			c.rgb = 0;
+		}
         c.a = saturate(c.a*AlphaScale);
     }
     if (EnableTint > 0)
diff --git a/Todo.txt b/Todo.txt
index 226e7e1..df52606 100644
--- a/Todo.txt
+++ b/Todo.txt
@@ -101,13 +101,13 @@ done:
 
 
 [v.29]
-Improved selected MLO instance display - portals, limbo room
 New Project Window
 RPF Explorer drag & drop
 Show vehicle wheels
 Snap to ground, snap to grid
 CodeWalker.Core library
 Improved GTA folder management
+Improved selected MLO instance display - portals, limbo room
 entitySets - like mapDataGroups but for interiors..... in Mlo data
 World view - delete key - delete item!
 RPF Explorer Edit mode
diff --git a/WorldForm.cs b/WorldForm.cs
index 5aebede..8814803 100644
--- a/WorldForm.cs
+++ b/WorldForm.cs
@@ -53,7 +53,7 @@ namespace CodeWalker
         bool rendermaps = false;
         bool renderworld = false;
         int startupviewmode = 0; //0=world, 1=ymap, 2=model
-        string modelname = "dt1_tc_dufo_core";//"dt1_11_fount_decal";//
+        string modelname = "dt1_tc_dufo_core";//"dt1_11_fount_decal";//"v_22_overlays";//
         string[] ymaplist;
 
         Vector3 prevworldpos = new Vector3(0, 0, 100); //also the start pos