diff --git a/source/games/blood/src/qav.cpp b/source/games/blood/src/qav.cpp
index 15bf2b6b9..2ced51015 100644
--- a/source/games/blood/src/qav.cpp
+++ b/source/games/blood/src/qav.cpp
@@ -969,6 +969,24 @@ static void qavRepairTileData(QAV* pQAV)
                 pQAV->frames[i].tiles[1].picnum = -1;
             }
             break;
+        case kQAVSGUNFIR1:
+        {
+            // SGUNFIR1's overlay sizes vary from tile to tile and don't interpolate properly.
+            // Use repaired tiles from Phredreeke where the overlays are baked in.
+            constexpr int tilearray[8] = { 9301, 9302, 9303, 9304, 9300, 9301, 9302, 3227 };
+
+            // Loop through each frame to remove overlay and replace use of 3227 with that from tilearray.
+            for (i = 0; i < pQAV->nFrames; i++)
+            {
+                pQAV->frames[i].tiles[0] = pQAV->frames[i].tiles[1];
+                pQAV->frames[i].tiles[1] = pQAV->frames[i].tiles[3];
+                pQAV->frames[i].tiles[0].picnum = tilearray[i];
+                pQAV->frames[i].tiles[2].picnum = -1;
+                pQAV->frames[i].tiles[3].picnum = -1;
+
+            }
+            break;
+        }
         default:
             return;
     }
diff --git a/wadsrc/static/filter/blood/engine/engine.def b/wadsrc/static/filter/blood/engine/engine.def
index e4843725b..2d63f1c5f 100644
--- a/wadsrc/static/filter/blood/engine/engine.def
+++ b/wadsrc/static/filter/blood/engine/engine.def
@@ -59,3 +59,10 @@ tilefromtexture 9277 { file "tiles/9277.png" }
 tilefromtexture 9278 { file "tiles/9278.png" }
 tilefromtexture 9279 { file "tiles/9279.png" }
 tilefromtexture 9280 { file "tiles/9280.png" }
+
+// Patched tiles for QAV interpolation, thanks to Phredreeke for supplying these.
+tilefromtexture 9300 { file "tiles/9300(3227+3228).png" }
+tilefromtexture 9301 { file "tiles/9301(3227+3229).png" }
+tilefromtexture 9302 { file "tiles/9302(3227+3230).png" }
+tilefromtexture 9303 { file "tiles/9303(3227+3231).png" }
+tilefromtexture 9304 { file "tiles/9304(3227+3232).png" }
diff --git a/wadsrc/static/filter/blood/tiles/9300(3227+3228).png b/wadsrc/static/filter/blood/tiles/9300(3227+3228).png
new file mode 100644
index 000000000..d3d116060
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diff --git a/wadsrc/static/filter/blood/tiles/9301(3227+3229).png b/wadsrc/static/filter/blood/tiles/9301(3227+3229).png
new file mode 100644
index 000000000..ab2ccc827
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diff --git a/wadsrc/static/filter/blood/tiles/9302(3227+3230).png b/wadsrc/static/filter/blood/tiles/9302(3227+3230).png
new file mode 100644
index 000000000..58803c418
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diff --git a/wadsrc/static/filter/blood/tiles/9303(3227+3231).png b/wadsrc/static/filter/blood/tiles/9303(3227+3231).png
new file mode 100644
index 000000000..cc3047253
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diff --git a/wadsrc/static/filter/blood/tiles/9304(3227+3232).png b/wadsrc/static/filter/blood/tiles/9304(3227+3232).png
new file mode 100644
index 000000000..d4ce051a8
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