diff --git a/Texconv/texconv.cpp b/Texconv/texconv.cpp
index 0c83595..cec34fd 100644
--- a/Texconv/texconv.cpp
+++ b/Texconv/texconv.cpp
@@ -101,6 +101,7 @@ enum OPTIONS
     OPT_COLORKEY,
     OPT_TONEMAP,
     OPT_X2_BIAS,
+    OPT_INVERT_Y,
     OPT_FILELIST,
     OPT_ROTATE_COLOR,
     OPT_PAPER_WHITE_NITS,
@@ -186,6 +187,7 @@ const SValue g_pOptions[] =
     { L"c",             OPT_COLORKEY },
     { L"tonemap",       OPT_TONEMAP },
     { L"x2bias",        OPT_X2_BIAS },
+    { L"inverty",       OPT_INVERT_Y },
     { L"flist",         OPT_FILELIST },
     { L"rotatecolor",   OPT_ROTATE_COLOR },
     { L"nits",          OPT_PAPER_WHITE_NITS },
@@ -749,6 +751,7 @@ namespace
         wprintf(L"   -nits <value>       paper-white value in nits to use for HDR10 (def: 200.0)\n");
         wprintf(L"   -tonemap            Apply a tonemap operator based on maximum luminance\n");
         wprintf(L"   -x2bias             Enable *2 - 1 conversion cases for unorm/pos-only-float\n");
+        wprintf(L"   -inverty            Invert Y (i.e. green) channel values\n");
         wprintf(L"   -flist <filename>   use text file with a list of input files (one per line)\n");
 
         wprintf(L"\n   <format>: ");
@@ -2475,6 +2478,54 @@ int __cdecl wmain(_In_ int argc, _In_z_count_(argc) wchar_t* argv[])
             cimage.reset();
         }
 
+        // --- Invert Y Channel --------------------------------------------------------
+        if (dwOptions & (DWORD64(1) << OPT_INVERT_Y))
+        {
+            std::unique_ptr<ScratchImage> timage(new (std::nothrow) ScratchImage);
+            if (!timage)
+            {
+                wprintf(L"\nERROR: Memory allocation failed\n");
+                return 1;
+            }
+
+            hr = TransformImage(image->GetImages(), image->GetImageCount(), image->GetMetadata(),
+                [&](XMVECTOR* outPixels, const XMVECTOR* inPixels, size_t width, size_t y)
+            {
+                static const XMVECTORU32 s_selecty = { { { XM_SELECT_0, XM_SELECT_1, XM_SELECT_0, XM_SELECT_0 } } };
+
+                UNREFERENCED_PARAMETER(y);
+
+                for (size_t j = 0; j < width; ++j)
+                {
+                    XMVECTOR value = inPixels[j];
+
+                    XMVECTOR inverty = XMVectorSubtract(g_XMOne, value);
+
+                    outPixels[j] = XMVectorSelect(value, inverty, s_selecty);
+                }
+            }, *timage);
+            if (FAILED(hr))
+            {
+                wprintf(L" FAILED [inverty] (%x)\n", hr);
+                return 1;
+            }
+
+            auto& tinfo = timage->GetMetadata();
+            tinfo;
+
+            assert(info.width == tinfo.width);
+            assert(info.height == tinfo.height);
+            assert(info.depth == tinfo.depth);
+            assert(info.arraySize == tinfo.arraySize);
+            assert(info.mipLevels == tinfo.mipLevels);
+            assert(info.miscFlags == tinfo.miscFlags);
+            assert(info.format == tinfo.format);
+            assert(info.dimension == tinfo.dimension);
+
+            image.swap(timage);
+            cimage.reset();
+        }
+
         // --- Generate mips -----------------------------------------------------------
         DWORD dwFilter3D = dwFilter;
         if (!ispow2(info.width) || !ispow2(info.height) || !ispow2(info.depth))