diff --git a/game/reconstructed/btl4gaug.cpp b/game/reconstructed/btl4gaug.cpp
index 1f9fd72..0c424eb 100644
--- a/game/reconstructed/btl4gaug.cpp
+++ b/game/reconstructed/btl4gaug.cpp
@@ -2228,18 +2228,24 @@ void BitMapInverseWipeScalar::Execute()
 		if (bmp != NULL)
 		{
 			int split = level;
+			// DrawBitMap's first argument is ALWAYS 0 in the sibling wipe's
+			// Execute (btl4gaug LeakGauge) -- passing a colour there smeared
+			// the whole gauge surface (field-caught: striped garbage across
+			// the weapon MFD pages, git/capture.png 2026-08-03).  Colour
+			// selection is SetColor only; the two spans carry the inverted
+			// pair via SetColor alone.
 			if (split != 0)
 			{
 				localView.MoveToAbsolute(0, 0);
 				localView.SetColor(colorA);
-				localView.DrawBitMap(colorB, bmp, 0, 0, split, height);
+				localView.DrawBitMap(0, bmp, 0, 0, split, height);
 				++split;										// the binary's iVar2++
 			}
 			if (split < width)
 			{
 				localView.MoveToAbsolute(split, 0);
 				localView.SetColor(colorB);
-				localView.DrawBitMap(colorA, bmp, split, 0, width, height);
+				localView.DrawBitMap(0, bmp, split, 0, width, height);
 			}
 			warehouse->bitMapBin.Release(imageName);
 		}