diff --git a/LEGO1/omni/include/mxbitmap.h b/LEGO1/omni/include/mxbitmap.h
index a11853e4..a6854853 100644
--- a/LEGO1/omni/include/mxbitmap.h
+++ b/LEGO1/omni/include/mxbitmap.h
@@ -34,6 +34,7 @@ struct MxBITMAPINFO {
 
 // SIZE 0x20
 // VTABLE: LEGO1 0x100dc7b0
+// VTABLE: BETA10 0x101c21f8
 class MxBitmap : public MxCore {
 public:
 	MxBitmap();
@@ -46,6 +47,7 @@ class MxBitmap : public MxCore {
 	virtual MxLong Read(const char* p_filename);                                           // vtable+24
 
 	// FUNCTION: LEGO1 0x1004e0d0
+	// FUNCTION: BETA10 0x10060fc0
 	virtual int VTable0x28(int) { return -1; } // vtable+28
 
 	virtual void BitBlt(
@@ -82,20 +84,32 @@ class MxBitmap : public MxCore {
 	// Bit mask trick to round up to the nearest multiple of four.
 	// Pixel data may be stored with padding.
 	// https://learn.microsoft.com/en-us/windows/win32/medfound/image-stride
+	// 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?
+	// FUNCTION: BETA10 0x1002c690
 	inline MxLong AbsFlipped(MxLong p_value) const { return p_value > 0 ? p_value : -p_value; }
 
 	inline BITMAPINFOHEADER* GetBmiHeader() const { return m_bmiHeader; }
+
+	// FUNCTION: BETA10 0x1002c440
 	inline MxLong GetBmiWidth() const { return m_bmiHeader->biWidth; }
 	inline MxLong GetBmiStride() const { return ((m_bmiHeader->biWidth + 3) & -4); }
 	inline MxLong GetBmiHeight() const { return m_bmiHeader->biHeight; }
+
+	// FUNCTION: BETA10 0x1002c470
 	inline MxLong GetBmiHeightAbs() const { return AbsFlipped(m_bmiHeader->biHeight); }
+
+	// FUNCTION: BETA10 0x10083900
 	inline MxU8* GetImage() const { return m_data; }
+
+	// FUNCTION: BETA10 0x100838d0
 	inline MxBITMAPINFO* GetBitmapInfo() const { return m_info; }
+
+	// FUNCTION: BETA10 0x100982b0
 	inline MxLong GetDataSize() const
 	{
 		MxLong absHeight = GetBmiHeightAbs();
@@ -138,6 +152,7 @@ class MxBitmap : public MxCore {
 	}
 
 	// SYNTHETIC: LEGO1 0x100bc9f0
+	// SYNTHETIC: BETA10 0x1013dcd0
 	// MxBitmap::`scalar deleting destructor'
 
 private:
diff --git a/LEGO1/omni/src/video/mxbitmap.cpp b/LEGO1/omni/src/video/mxbitmap.cpp
index de8dc6f2..d64e90d0 100644
--- a/LEGO1/omni/src/video/mxbitmap.cpp
+++ b/LEGO1/omni/src/video/mxbitmap.cpp
@@ -8,9 +8,11 @@ DECOMP_SIZE_ASSERT(MxBitmap, 0x20);
 DECOMP_SIZE_ASSERT(MxBITMAPINFO, 0x428);
 
 // GLOBAL: LEGO1 0x10102184
+// GLOBAL: BETA10 0x10203030
 MxU16 g_bitmapSignature = TWOCC('B', 'M');
 
 // FUNCTION: LEGO1 0x100bc980
+// FUNCTION: BETA10 0x1013cab0
 MxBitmap::MxBitmap()
 {
 	m_info = NULL;
@@ -22,6 +24,7 @@ MxBitmap::MxBitmap()
 }
 
 // FUNCTION: LEGO1 0x100bca10
+// FUNCTION: BETA10 0x1013cb58
 MxBitmap::~MxBitmap()
 {
 	if (m_info) {
@@ -36,6 +39,7 @@ MxBitmap::~MxBitmap()
 }
 
 // FUNCTION: LEGO1 0x100bcaa0
+// FUNCTION: BETA10 0x1013cc47
 MxResult MxBitmap::SetSize(MxS32 p_width, MxS32 p_height, MxPalette* p_palette, MxBool p_isHighColor)
 {
 	MxResult ret = FAILURE;
@@ -81,6 +85,7 @@ MxResult MxBitmap::SetSize(MxS32 p_width, MxS32 p_height, MxPalette* p_palette,
 }
 
 // FUNCTION: LEGO1 0x100bcba0
+// FUNCTION: BETA10 0x1013ce25
 MxResult MxBitmap::ImportBitmapInfo(MxBITMAPINFO* p_info)
 {
 	MxResult result = FAILURE;
@@ -115,6 +120,7 @@ MxResult MxBitmap::ImportBitmapInfo(MxBITMAPINFO* p_info)
 }
 
 // FUNCTION: LEGO1 0x100bcc40
+// FUNCTION: BETA10 0x1013cf6d
 MxResult MxBitmap::ImportBitmap(MxBitmap* p_bitmap)
 {
 	MxResult result = FAILURE;
@@ -148,6 +154,7 @@ MxResult MxBitmap::ImportBitmap(MxBitmap* p_bitmap)
 }
 
 // FUNCTION: LEGO1 0x100bcd10
+// FUNCTION: BETA10 0x1013d0c7
 MxLong MxBitmap::Read(const char* p_filename)
 {
 	MxResult result = FAILURE;
@@ -166,6 +173,7 @@ MxLong MxBitmap::Read(const char* p_filename)
 }
 
 // FUNCTION: LEGO1 0x100bcd60
+// FUNCTION: BETA10 0x1013d169
 MxResult MxBitmap::LoadFile(HANDLE p_handle)
 {
 	MxResult result = FAILURE;
@@ -212,6 +220,7 @@ MxResult MxBitmap::LoadFile(HANDLE p_handle)
 }
 
 // FUNCTION: LEGO1 0x100bce70
+// FUNCTION: BETA10 0x1013d399
 void MxBitmap::BitBlt(
 	MxBitmap* p_src,
 	MxS32 p_srcLeft,
@@ -251,6 +260,7 @@ void MxBitmap::BitBlt(
 }
 
 // FUNCTION: LEGO1 0x100bd020
+// FUNCTION: BETA10 0x1013d4ea
 void MxBitmap::BitBltTransparent(
 	MxBitmap* p_src,
 	MxS32 p_srcLeft,
@@ -297,6 +307,7 @@ void MxBitmap::BitBltTransparent(
 }
 
 // FUNCTION: LEGO1 0x100bd1c0
+// FUNCTION: BETA10 0x1013d684
 MxPalette* MxBitmap::CreatePalette()
 {
 	MxBool success = FALSE;
@@ -335,6 +346,7 @@ MxPalette* MxBitmap::CreatePalette()
 }
 
 // FUNCTION: LEGO1 0x100bd280
+// FUNCTION: BETA10 0x1013d80e
 void MxBitmap::ImportPalette(MxPalette* p_palette)
 {
 	// Odd to use a switch on a boolean, but it matches.
@@ -353,6 +365,7 @@ void MxBitmap::ImportPalette(MxPalette* p_palette)
 }
 
 // FUNCTION: LEGO1 0x100bd2d0
+// FUNCTION: BETA10 0x1013d8a9
 MxResult MxBitmap::SetBitDepth(MxBool p_isHighColor)
 {
 	MxResult ret = FAILURE;
@@ -408,6 +421,7 @@ MxResult MxBitmap::SetBitDepth(MxBool p_isHighColor)
 }
 
 // FUNCTION: LEGO1 0x100bd3e0
+// FUNCTION: BETA10 0x1013dad2
 MxResult MxBitmap::StretchBits(
 	HDC p_hdc,
 	MxS32 p_xSrc,
@@ -441,6 +455,7 @@ MxResult MxBitmap::StretchBits(
 }
 
 // FUNCTION: LEGO1 0x100bd450
+// FUNCTION: BETA10 0x1013db55
 MxResult MxBitmap::ImportColorsToPalette(RGBQUAD* p_rgbquad, MxPalette* p_palette)
 {
 	MxResult ret = FAILURE;