diff --git a/LEGO1/lego/legoomni/include/legotextureinfo.h b/LEGO1/lego/legoomni/include/legotextureinfo.h
index e7cd894b9d..c070bfecb7 100644
--- a/LEGO1/lego/legoomni/include/legotextureinfo.h
+++ b/LEGO1/lego/legoomni/include/legotextureinfo.h
@@ -19,7 +19,7 @@ class LegoTextureInfo {
 	static BOOL SetGroupTexture(Tgl::Mesh* pMesh, LegoTextureInfo* p_textureInfo);
 	static BOOL GetGroupTexture(Tgl::Mesh* pMesh, LegoTextureInfo*& p_textureInfo);
 
-	LegoResult FUN_10066010(LegoU8* p_bits);
+	LegoResult FUN_10066010(const LegoU8* p_bits);
 
 	// private:
 	char* m_name;                   // 0x00
diff --git a/LEGO1/lego/legoomni/src/common/legobackgroundcolor.cpp b/LEGO1/lego/legoomni/src/common/legobackgroundcolor.cpp
index c66dd26952..bc31bb2ccd 100644
--- a/LEGO1/lego/legoomni/src/common/legobackgroundcolor.cpp
+++ b/LEGO1/lego/legoomni/src/common/legobackgroundcolor.cpp
@@ -121,9 +121,9 @@ void LegoBackgroundColor::SetLightColor(float p_r, float p_g, float p_b)
 {
 	if (!VideoManager()->GetVideoParam().Flags().GetF2bit0()) {
 		// TODO: Computed constants based on what?
-		p_r *= 4.3478260869565215;
-		p_g *= 1.5873015873015872;
-		p_b *= 1.1764705882352942;
+		p_r *= 1. / 0.23;
+		p_g *= 1. / 0.63;
+		p_b *= 1. / 0.85;
 
 		if (p_r > 1.0) {
 			p_r = 1.0;
diff --git a/LEGO1/lego/legoomni/src/common/legotextureinfo.cpp b/LEGO1/lego/legoomni/src/common/legotextureinfo.cpp
index ea00ad5f14..51678ed814 100644
--- a/LEGO1/lego/legoomni/src/common/legotextureinfo.cpp
+++ b/LEGO1/lego/legoomni/src/common/legotextureinfo.cpp
@@ -71,7 +71,7 @@ LegoTextureInfo* LegoTextureInfo::Create(const char* p_name, LegoTexture* p_text
 	desc.ddpfPixelFormat.dwRGBBitCount = 8;
 
 	MxS32 i;
-	LegoU8* bits;
+	const LegoU8* bits;
 	MxU8* surface;
 
 	if (pDirectDraw->CreateSurface(&desc, &textureInfo->m_surface, NULL) != DD_OK) {
@@ -186,7 +186,7 @@ BOOL LegoTextureInfo::GetGroupTexture(Tgl::Mesh* pMesh, LegoTextureInfo*& p_text
 }
 
 // FUNCTION: LEGO1 0x10066010
-LegoResult LegoTextureInfo::FUN_10066010(LegoU8* p_bits)
+LegoResult LegoTextureInfo::FUN_10066010(const LegoU8* p_bits)
 {
 	if (m_surface != NULL && m_texture != NULL) {
 		DDSURFACEDESC desc;
@@ -195,7 +195,7 @@ LegoResult LegoTextureInfo::FUN_10066010(LegoU8* p_bits)
 
 		if (m_surface->Lock(NULL, &desc, 0, NULL) == DD_OK) {
 			MxU8* surface = (MxU8*) desc.lpSurface;
-			LegoU8* bits = p_bits;
+			const LegoU8* bits = p_bits;
 
 			if (desc.dwWidth == desc.lPitch) {
 				memcpy(desc.lpSurface, p_bits, desc.dwWidth * desc.dwHeight);
diff --git a/LEGO1/lego/legoomni/src/common/legoutils.cpp b/LEGO1/lego/legoomni/src/common/legoutils.cpp
index 48d021b03d..e1a61a38d8 100644
--- a/LEGO1/lego/legoomni/src/common/legoutils.cpp
+++ b/LEGO1/lego/legoomni/src/common/legoutils.cpp
@@ -709,7 +709,7 @@ void WriteDefaultTexture(LegoFile* p_file, const char* p_name)
 				}
 				else {
 					MxU8* surface = (MxU8*) desc.lpSurface;
-					LegoU8* bits = image->GetBits();
+					const LegoU8* bits = image->GetBits();
 
 					for (MxS32 i = 0; i < desc.dwHeight; i++) {
 						memcpy(surface, bits, desc.dwWidth);
diff --git a/LEGO1/lego/sources/anim/legoanim.cpp b/LEGO1/lego/sources/anim/legoanim.cpp
index 930e40a485..39b8921bd3 100644
--- a/LEGO1/lego/sources/anim/legoanim.cpp
+++ b/LEGO1/lego/sources/anim/legoanim.cpp
@@ -1163,7 +1163,7 @@ undefined4 LegoAnim::GetActorUnknown0x04(LegoU32 p_index)
 		return m_modelList[p_index].m_unk0x04;
 	}
 
-	return NULL;
+	return 0;
 }
 
 // FUNCTION: LEGO1 0x100a0f60
diff --git a/LEGO1/omni/src/video/mxdisplaysurface.cpp b/LEGO1/omni/src/video/mxdisplaysurface.cpp
index d08322ce70..685c59be92 100644
--- a/LEGO1/omni/src/video/mxdisplaysurface.cpp
+++ b/LEGO1/omni/src/video/mxdisplaysurface.cpp
@@ -13,6 +13,8 @@
 
 DECOMP_SIZE_ASSERT(MxDisplaySurface, 0xac);
 
+#define RGB555_CREATE(R, G, B) (((R) << 10) | (G) << 5 | (B) << 0)
+
 // GLOBAL: LEGO1 0x1010215c
 MxU32 g_unk0x1010215c = 0;
 
@@ -976,8 +978,8 @@ LPDIRECTDRAWSURFACE MxDisplaySurface::VTable0x44(
 				if (p_transparent) {
 					for (MxS32 y = 0; y < heightAbs; y++) {
 						for (MxS32 x = 0; x < widthNormal; x++) {
-							if (*bitmapSrcPtr == NULL) {
-								*surfaceData = 31775;
+							if (*bitmapSrcPtr == 0) {
+								*surfaceData = RGB555_CREATE(0x1f, 0, 0x1f);
 							}
 							else {
 								*surfaceData = m_16bitPal[*bitmapSrcPtr];
@@ -992,7 +994,7 @@ LPDIRECTDRAWSURFACE MxDisplaySurface::VTable0x44(
 					}
 
 					DDCOLORKEY key;
-					key.dwColorSpaceLowValue = key.dwColorSpaceHighValue = 31775;
+					key.dwColorSpaceLowValue = key.dwColorSpaceHighValue = RGB555_CREATE(0x1f, 0, 0x1f);
 					surface->SetColorKey(DDCKEY_SRCBLT, &key);
 				}
 				else {
@@ -1098,7 +1100,7 @@ LPDIRECTDRAWSURFACE MxDisplaySurface::CreateCursorSurface()
 			for (MxS32 y = 0; y < 16; y++) {
 				if ((y > 10 || x) && (x > 10 || y) && x + y != 10) {
 					if (x + y > 10) {
-						*surface2 = 31775;
+						*surface2 = RGB555_CREATE(0x1f, 0, 0x1f);
 					}
 					else {
 						*surface2 = -1;
@@ -1114,8 +1116,8 @@ LPDIRECTDRAWSURFACE MxDisplaySurface::CreateCursorSurface()
 
 		newSurface->Unlock(ddsd.lpSurface);
 		DDCOLORKEY colorkey;
-		colorkey.dwColorSpaceHighValue = 31775;
-		colorkey.dwColorSpaceLowValue = 31775;
+		colorkey.dwColorSpaceHighValue = RGB555_CREATE(0x1f, 0, 0x1f);
+		colorkey.dwColorSpaceLowValue = RGB555_CREATE(0x1f, 0, 0x1f);
 		newSurface->SetColorKey(DDCKEY_SRCBLT, &colorkey);
 
 		return newSurface;
diff --git a/LEGO1/tgl/d3drm/texture.cpp b/LEGO1/tgl/d3drm/texture.cpp
index 79452ba6b0..ea8ef1b0ec 100644
--- a/LEGO1/tgl/d3drm/texture.cpp
+++ b/LEGO1/tgl/d3drm/texture.cpp
@@ -81,7 +81,7 @@ TglD3DRMIMAGE::TglD3DRMIMAGE(
 void TglD3DRMIMAGE::Destroy()
 {
 	if (m_texelsAllocatedByClient == 0) {
-		delete m_image.buffer1;
+		delete[] ((char*) m_image.buffer1);
 	}
 	delete m_image.palette;
 }
@@ -111,7 +111,7 @@ Result TglD3DRMIMAGE::CreateBuffer(int width, int height, int depth, void* pBuff
 	m_image.bytes_per_line = width;
 
 	if (!m_texelsAllocatedByClient) {
-		delete[] m_image.buffer1;
+		delete[] ((char*) m_image.buffer1);
 		m_image.buffer1 = NULL;
 	}