diff --git a/Penumbra/Import/Textures/CombinedTexture.cs b/Penumbra/Import/Textures/CombinedTexture.cs
index c1a22088..f5f921be 100644
--- a/Penumbra/Import/Textures/CombinedTexture.cs
+++ b/Penumbra/Import/Textures/CombinedTexture.cs
@@ -6,7 +6,10 @@ public partial class CombinedTexture : IDisposable
     {
         AsIs,
         Bitmap,
+        BC1,
         BC3,
+        BC4,
+        BC5,
         BC7,
     }
 
diff --git a/Penumbra/Import/Textures/TextureManager.cs b/Penumbra/Import/Textures/TextureManager.cs
index 7118f8af..0c85f5be 100644
--- a/Penumbra/Import/Textures/TextureManager.cs
+++ b/Penumbra/Import/Textures/TextureManager.cs
@@ -1,3 +1,4 @@
+using Dalamud.Interface;
 using Dalamud.Interface.Textures;
 using Dalamud.Interface.Textures.TextureWraps;
 using Dalamud.Plugin.Services;
@@ -6,15 +7,17 @@ using OtterGui.Log;
 using OtterGui.Services;
 using OtterGui.Tasks;
 using OtterTex;
+using SharpDX.Direct3D11;
 using SixLabors.ImageSharp;
 using SixLabors.ImageSharp.Formats.Png;
 using SixLabors.ImageSharp.Formats.Tga;
 using SixLabors.ImageSharp.PixelFormats;
+using DxgiDevice = SharpDX.DXGI.Device;
 using Image = SixLabors.ImageSharp.Image;
 
 namespace Penumbra.Import.Textures;
 
-public sealed class TextureManager(IDataManager gameData, Logger logger, ITextureProvider textureProvider)
+public sealed class TextureManager(IDataManager gameData, Logger logger, ITextureProvider textureProvider, IUiBuilder uiBuilder)
     : SingleTaskQueue, IDisposable, IService
 {
     private readonly Logger _logger = logger;
@@ -201,8 +204,11 @@ public sealed class TextureManager(IDataManager gameData, Logger logger, ITextur
                     rgba, width, height),
                 CombinedTexture.TextureSaveType.AsIs when imageTypeBehaviour is TextureType.Dds => AddMipMaps(image.AsDds!, _mipMaps),
                 CombinedTexture.TextureSaveType.Bitmap => ConvertToRgbaDds(image, _mipMaps, cancel, rgba, width, height),
-                CombinedTexture.TextureSaveType.BC3 => ConvertToCompressedDds(image, _mipMaps, false, cancel, rgba, width, height),
-                CombinedTexture.TextureSaveType.BC7 => ConvertToCompressedDds(image, _mipMaps, true, cancel, rgba, width, height),
+                CombinedTexture.TextureSaveType.BC1 => _textures.ConvertToCompressedDds(image, _mipMaps, DXGIFormat.BC1UNorm, cancel, rgba, width, height),
+                CombinedTexture.TextureSaveType.BC3 => _textures.ConvertToCompressedDds(image, _mipMaps, DXGIFormat.BC3UNorm, cancel, rgba, width, height),
+                CombinedTexture.TextureSaveType.BC4 => _textures.ConvertToCompressedDds(image, _mipMaps, DXGIFormat.BC4UNorm, cancel, rgba, width, height),
+                CombinedTexture.TextureSaveType.BC5 => _textures.ConvertToCompressedDds(image, _mipMaps, DXGIFormat.BC5UNorm, cancel, rgba, width, height),
+                CombinedTexture.TextureSaveType.BC7 => _textures.ConvertToCompressedDds(image, _mipMaps, DXGIFormat.BC7UNorm, cancel, rgba, width, height),
                 _ => throw new Exception("Wrong save type."),
             };
 
@@ -320,7 +326,7 @@ public sealed class TextureManager(IDataManager gameData, Logger logger, ITextur
     }
 
     /// <summary> Convert an existing image to a block compressed .dds. Does not create a deep copy of an existing dds of the correct format and just returns the existing one. </summary>
-    public static BaseImage ConvertToCompressedDds(BaseImage input, bool mipMaps, bool bc7, CancellationToken cancel, byte[]? rgba = null,
+    public BaseImage ConvertToCompressedDds(BaseImage input, bool mipMaps, DXGIFormat format, CancellationToken cancel, byte[]? rgba = null,
         int width = 0, int height = 0)
     {
         switch (input.Type.ReduceToBehaviour())
@@ -331,12 +337,12 @@ public sealed class TextureManager(IDataManager gameData, Logger logger, ITextur
                 cancel.ThrowIfCancellationRequested();
                 var dds = ConvertToDds(rgba, width, height).AsDds!;
                 cancel.ThrowIfCancellationRequested();
-                return CreateCompressed(dds, mipMaps, bc7, cancel);
+                return CreateCompressed(dds, mipMaps, format, cancel);
             }
             case TextureType.Dds:
             {
                 var scratch = input.AsDds!;
-                return CreateCompressed(scratch, mipMaps, bc7, cancel);
+                return CreateCompressed(scratch, mipMaps, format, cancel);
             }
             default: return new BaseImage();
         }
@@ -384,9 +390,8 @@ public sealed class TextureManager(IDataManager gameData, Logger logger, ITextur
     }
 
     /// <summary> Create a BC3 or BC7 block-compressed .dds from the input (optionally with mipmaps). Returns input (+ mipmaps) if it is already the correct format. </summary>
-    public static ScratchImage CreateCompressed(ScratchImage input, bool mipMaps, bool bc7, CancellationToken cancel)
+    public ScratchImage CreateCompressed(ScratchImage input, bool mipMaps, DXGIFormat format, CancellationToken cancel)
     {
-        var format = bc7 ? DXGIFormat.BC7UNorm : DXGIFormat.BC3UNorm;
         if (input.Meta.Format == format)
             return input;
 
@@ -398,6 +403,16 @@ public sealed class TextureManager(IDataManager gameData, Logger logger, ITextur
 
         input = AddMipMaps(input, mipMaps);
         cancel.ThrowIfCancellationRequested();
+        // See https://github.com/microsoft/DirectXTex/wiki/Compress#parameters for the format condition.
+        if (format is DXGIFormat.BC6HUF16 or DXGIFormat.BC6HSF16 or DXGIFormat.BC7UNorm or DXGIFormat.BC7UNormSRGB)
+        {
+            var device     = uiBuilder.Device;
+            var dxgiDevice = device.QueryInterface<DxgiDevice>();
+
+            using var deviceClone = new Device(dxgiDevice.Adapter, device.CreationFlags, device.FeatureLevel);
+            return input.Compress(deviceClone.NativePointer, format, CompressFlags.Parallel);
+        }
+
         return input.Compress(format, CompressFlags.BC7Quick | CompressFlags.Parallel);
     }
 
diff --git a/Penumbra/Penumbra.csproj b/Penumbra/Penumbra.csproj
index b4266aeb..870865da 100644
--- a/Penumbra/Penumbra.csproj
+++ b/Penumbra/Penumbra.csproj
@@ -80,6 +80,10 @@
             <HintPath>$(DalamudLibPath)SharpDX.Direct3D11.dll</HintPath>
             <Private>False</Private>
         </Reference>
+        <Reference Include="SharpDX.DXGI">
+            <HintPath>$(DalamudLibPath)SharpDX.DXGI.dll</HintPath>
+            <Private>False</Private>
+        </Reference>
         <Reference Include="OtterTex.dll">
             <HintPath>lib\OtterTex.dll</HintPath>
         </Reference>
diff --git a/Penumbra/UI/AdvancedWindow/Materials/MtrlTab.LivePreview.cs b/Penumbra/UI/AdvancedWindow/Materials/MtrlTab.LivePreview.cs
index 01a40980..5025bafd 100644
--- a/Penumbra/UI/AdvancedWindow/Materials/MtrlTab.LivePreview.cs
+++ b/Penumbra/UI/AdvancedWindow/Materials/MtrlTab.LivePreview.cs
@@ -138,7 +138,7 @@ public partial class MtrlTab
         foreach (var constant in Mtrl.ShaderPackage.Constants)
         {
             var values = Mtrl.GetConstantValue<byte>(constant);
-            if (values != null)
+            if (values != [])
                 SetMaterialParameter(constant.Id, 0, values);
         }
 
diff --git a/Penumbra/UI/AdvancedWindow/ModEditWindow.Textures.cs b/Penumbra/UI/AdvancedWindow/ModEditWindow.Textures.cs
index c08e8a8e..4664372e 100644
--- a/Penumbra/UI/AdvancedWindow/ModEditWindow.Textures.cs
+++ b/Penumbra/UI/AdvancedWindow/ModEditWindow.Textures.cs
@@ -25,11 +25,17 @@ public partial class ModEditWindow
     {
         ("As Is", "Save the current texture with its own format without additional conversion or compression, if possible."),
         ("RGBA (Uncompressed)",
-            "Save the current texture as an uncompressed BGRA bitmap. This requires the most space but technically offers the best quality."),
-        ("BC3 (Simple Compression)",
-            "Save the current texture compressed via BC3/DXT5 compression. This offers a 4:1 compression ratio and is quick with acceptable quality."),
-        ("BC7 (Complex Compression)",
-            "Save the current texture compressed via BC7 compression. This offers a 4:1 compression ratio and has almost indistinguishable quality, but may take a while."),
+            "Save the current texture as an uncompressed BGRA bitmap.\nThis requires the most space but technically offers the best quality."),
+        ("BC1 (Simple Compression for Opaque RGB)",
+            "Save the current texture compressed via BC1/DXT1 compression.\nThis offers a 8:1 compression ratio and is quick with acceptable quality, but only supports RGB, without Alpha.\n\nCan be used for diffuse maps and equipment textures to save extra space."),
+        ("BC3 (Simple Compression for RGBA)",
+            "Save the current texture compressed via BC3/DXT5 compression.\nThis offers a 4:1 compression ratio and is quick with acceptable quality, and fully supports RGBA.\n\nGeneric format that can be used for most textures."),
+        ("BC4 (Simple Compression for Opaque Grayscale)",
+            "Save the current texture compressed via BC4 compression.\nThis offers a 8:1 compression ratio and has almost indistinguishable quality, but only supports Grayscale, without Alpha.\n\nCan be used for face paints and legacy marks."),
+        ("BC5 (Simple Compression for Opaque RG)",
+            "Save the current texture compressed via BC5 compression.\nThis offers a 4:1 compression ratio and has almost indistinguishable quality, but only supports RG, without B or Alpha.\n\nRecommended for index maps, unrecommended for normal maps."),
+        ("BC7 (Complex Compression for RGBA)",
+            "Save the current texture compressed via BC7 compression.\nThis offers a 4:1 compression ratio and has almost indistinguishable quality, but may take a while.\n\nGeneric format that can be used for most textures."),
     };
 
     private void DrawInputChild(string label, Texture tex, Vector2 size, Vector2 imageSize)
@@ -134,7 +140,7 @@ public partial class ModEditWindow
                     tt, !isActive || !canSaveInPlace || _center.IsLeftCopy && _currentSaveAs == (int)CombinedTexture.TextureSaveType.AsIs))
             {
                 _center.SaveAs(_left.Type, _textures, _left.Path, (CombinedTexture.TextureSaveType)_currentSaveAs, _addMipMaps);
-                InvokeChange(Mod, _left.Path);
+                AddChangeTask(_left.Path);
                 AddReloadTask(_left.Path, false);
             }
 
@@ -159,7 +165,7 @@ public partial class ModEditWindow
                     !canConvertInPlace || _left.Format is DXGIFormat.BC7Typeless or DXGIFormat.BC7UNorm or DXGIFormat.BC7UNormSRGB))
             {
                 _center.SaveAsTex(_textures, _left.Path, CombinedTexture.TextureSaveType.BC7, _left.MipMaps > 1);
-                InvokeChange(Mod, _left.Path);
+                AddChangeTask(_left.Path);
                 AddReloadTask(_left.Path, false);
             }
 
@@ -169,7 +175,7 @@ public partial class ModEditWindow
                     !canConvertInPlace || _left.Format is DXGIFormat.BC3Typeless or DXGIFormat.BC3UNorm or DXGIFormat.BC3UNormSRGB))
             {
                 _center.SaveAsTex(_textures, _left.Path, CombinedTexture.TextureSaveType.BC3, _left.MipMaps > 1);
-                InvokeChange(Mod, _left.Path);
+                AddChangeTask(_left.Path);
                 AddReloadTask(_left.Path, false);
             }
 
@@ -180,7 +186,7 @@ public partial class ModEditWindow
                  || _left.Format is DXGIFormat.B8G8R8A8UNorm or DXGIFormat.B8G8R8A8Typeless or DXGIFormat.B8G8R8A8UNormSRGB))
             {
                 _center.SaveAsTex(_textures, _left.Path, CombinedTexture.TextureSaveType.Bitmap, _left.MipMaps > 1);
-                InvokeChange(Mod, _left.Path);
+                AddChangeTask(_left.Path);
                 AddReloadTask(_left.Path, false);
             }
         }
@@ -235,7 +241,7 @@ public partial class ModEditWindow
                 if (a)
                 {
                     _center.SaveAs(null, _textures, b, (CombinedTexture.TextureSaveType)_currentSaveAs, _addMipMaps);
-                    InvokeChange(Mod, b);
+                    AddChangeTask(b);
                     if (b == _left.Path)
                         AddReloadTask(_left.Path, false);
                     else if (b == _right.Path)
@@ -245,6 +251,17 @@ public partial class ModEditWindow
         _forceTextureStartPath = false;
     }
 
+    private void AddChangeTask(string path)
+    {
+        _center.SaveTask.ContinueWith(t =>
+        {
+            if (!t.IsCompletedSuccessfully)
+                return;
+
+            _framework.RunOnFrameworkThread(() => InvokeChange(Mod, path));
+        }, TaskScheduler.Default);
+    }
+
     private void AddReloadTask(string path, bool right)
     {
         _center.SaveTask.ContinueWith(t =>
diff --git a/Penumbra/lib/OtterTex.dll b/Penumbra/lib/OtterTex.dll
index 29912e62..c137aee1 100644
Binary files a/Penumbra/lib/OtterTex.dll and b/Penumbra/lib/OtterTex.dll differ