diff --git a/ArcFormats/ArcFormats.csproj b/ArcFormats/ArcFormats.csproj
index 2cd422b4..b5a4f579 100644
--- a/ArcFormats/ArcFormats.csproj
+++ b/ArcFormats/ArcFormats.csproj
@@ -162,6 +162,7 @@
+
diff --git a/ArcFormats/FrontierWorks/ImageEXT.cs b/ArcFormats/FrontierWorks/ImageEXT.cs
new file mode 100644
index 00000000..7232b83e
--- /dev/null
+++ b/ArcFormats/FrontierWorks/ImageEXT.cs
@@ -0,0 +1,82 @@
+//! \file ImageEXT.cs
+//! \date Tue Feb 10 2026 08:21:40
+//! \brief Frontier Works engine image format.
+//
+// Copyright (C) 2015 by morkt
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to
+// deal in the Software without restriction, including without limitation the
+// rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+// sell copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+// IN THE SOFTWARE.
+//
+
+using System;
+using System.ComponentModel.Composition;
+using System.IO;
+using System.Windows.Media;
+
+namespace GameRes.Formats.FrontierWorks
+{
+ [Export(typeof(ImageFormat))]
+ public class ExtFormat : ImageFormat
+ {
+ public override string Tag { get { return "EXT"; } }
+ public override string Description { get { return "Frontier Works engine image format"; } }
+ public override uint Signature { get { return 0x30545845; } } // 'EXT0'
+
+ public ExtFormat ()
+ {
+ Extensions = new string[] { "ext" };
+ }
+
+ public override ImageMetaData ReadMetaData (IBinaryStream stream)
+ {
+ stream.Position = 0;
+ var signature = stream.ReadInt32 ();
+ if (0x30545845 != signature)
+ return null;
+ stream.Position = 0xC;
+ var width = stream.ReadUInt32 ();
+ var height = stream.ReadUInt32 ();
+ if (width > 0x1000 || height > 0x1000)
+ return null;
+ stream.Position = 0x24;
+ var bpp = stream.ReadByte ();
+ if (32 != bpp)
+ return null;
+ return new ImageMetaData
+ {
+ Width = width,
+ Height = height,
+ BPP = bpp,
+ };
+ }
+
+ public override ImageData Read (IBinaryStream stream, ImageMetaData info)
+ {
+ stream.Position = 0x100;
+ var pixels = new byte[info.Width*info.Height*4];
+ if (pixels.Length != stream.Read (pixels, 0, pixels.Length))
+ throw new EndOfStreamException ();
+ return ImageData.Create (info, PixelFormats.Bgra32, null, pixels);
+ }
+
+ public override void Write (Stream file, ImageData image)
+ {
+ throw new NotImplementedException ("ExtFormat.Write not implemented");
+ }
+ }
+}