diff --git a/LEGO1/omni/include/mxbitmap.h b/LEGO1/omni/include/mxbitmap.h
index a6854853..0d6a1bea 100644
--- a/LEGO1/omni/include/mxbitmap.h
+++ b/LEGO1/omni/include/mxbitmap.h
@@ -87,11 +87,12 @@ class MxBitmap : public MxCore {
 	// FUNCTION: BETA10 0x1002c510
 	inline MxLong AlignToFourByte(MxLong p_value) const { return (p_value + 3) & -4; }
 
-	// Same as the one from legoutils.h, but flipped the other way
-	// TODO: While it's not outside the realm of possibility that they
-	// reimplemented Abs for only this file, that seems odd, right?
+	// DECOMP: This could be a free function. It is static here because it has no
+	// reference to "this". In the beta it is called in two places:
+	// 1. GetBmiHeightAbs
+	// 2. at 0x101523b9, in reference to BITMAPINFOHEADER.biHeight
 	// FUNCTION: BETA10 0x1002c690
-	inline MxLong AbsFlipped(MxLong p_value) const { return p_value > 0 ? p_value : -p_value; }
+	static MxLong HeightAbs(MxLong p_value) { return p_value > 0 ? p_value : -p_value; }
 
 	inline BITMAPINFOHEADER* GetBmiHeader() const { return m_bmiHeader; }
 
@@ -101,7 +102,7 @@ class MxBitmap : public MxCore {
 	inline MxLong GetBmiHeight() const { return m_bmiHeader->biHeight; }
 
 	// FUNCTION: BETA10 0x1002c470
-	inline MxLong GetBmiHeightAbs() const { return AbsFlipped(m_bmiHeader->biHeight); }
+	inline MxLong GetBmiHeightAbs() const { return HeightAbs(m_bmiHeader->biHeight); }
 
 	// FUNCTION: BETA10 0x10083900
 	inline MxU8* GetImage() const { return m_data; }
@@ -156,6 +157,17 @@ class MxBitmap : public MxCore {
 	// MxBitmap::`scalar deleting destructor'
 
 private:
+	// FUNCTION: BETA10 0x1013dd30
+	inline MxBool IsBottomUp()
+	{
+		if (m_bmiHeader->biCompression == BI_RGB_TOPDOWN) {
+			return FALSE;
+		}
+		else {
+			return m_bmiHeader->biHeight > 0;
+		}
+	}
+
 	MxResult ImportColorsToPalette(RGBQUAD*, MxPalette*);
 
 	MxBITMAPINFO* m_info;          // 0x08
diff --git a/LEGO1/omni/src/video/mxbitmap.cpp b/LEGO1/omni/src/video/mxbitmap.cpp
index d64e90d0..c181687c 100644
--- a/LEGO1/omni/src/video/mxbitmap.cpp
+++ b/LEGO1/omni/src/video/mxbitmap.cpp
@@ -194,7 +194,7 @@ MxResult MxBitmap::LoadFile(HANDLE p_handle)
 						m_bmiHeader = &m_info->m_bmiHeader;
 						m_paletteData = m_info->m_bmiColors;
 						if (m_info->m_bmiHeader.biSizeImage == 0) {
-							MxLong height = AbsFlipped(m_info->m_bmiHeader.biHeight);
+							MxLong height = HeightAbs(m_info->m_bmiHeader.biHeight);
 							m_info->m_bmiHeader.biSizeImage = AlignToFourByte(m_info->m_bmiHeader.biWidth) * height;
 						}
 						result = SUCCESS;
@@ -433,8 +433,8 @@ MxResult MxBitmap::StretchBits(
 )
 {
 	// Compression fix?
-	if ((m_bmiHeader->biCompression != BI_RGB_TOPDOWN) && (0 < m_bmiHeader->biHeight)) {
-		p_ySrc = (m_bmiHeader->biHeight - p_destHeight) - p_ySrc;
+	if (IsBottomUp()) {
+		p_ySrc = GetBmiHeightAbs() - p_ySrc - p_destHeight;
 	}
 
 	return StretchDIBits(