diff --git a/LEGO1/legovideomanager.cpp b/LEGO1/legovideomanager.cpp
index 92440dd4..167b81a3 100644
--- a/LEGO1/legovideomanager.cpp
+++ b/LEGO1/legovideomanager.cpp
@@ -75,10 +75,53 @@ void LegoVideoManager::EnableFullScreenMovie(MxBool p_enable)
 	EnableFullScreenMovie(p_enable, TRUE);
 }
 
-// STUB: LEGO1 0x1007c310
+// FUNCTION: LEGO1 0x1007c310
 void LegoVideoManager::EnableFullScreenMovie(MxBool p_enable, MxBool p_scale)
 {
-	// TODO
+	if (m_isFullscreenMovie != p_enable) {
+		m_isFullscreenMovie = p_enable;
+
+		if (p_enable) {
+			m_palette = m_videoParam.GetPalette()->Clone();
+			OverrideSkyColor(FALSE);
+
+			m_displaySurface->GetVideoParam().Flags().SetF1bit3(p_scale);
+
+			m_unk0xe4 = FALSE;
+			m_unk0x500 = TRUE;
+		}
+		else {
+			m_displaySurface->FUN_100ba640();
+			m_displaySurface->GetVideoParam().Flags().SetF1bit3(FALSE);
+
+			// restore previous pallete
+			RealizePalette(m_palette);
+			delete m_palette;
+			m_palette = NULL;
+
+			// update region where video used to be
+			MxRect32 rect(
+				0,
+				0,
+				m_videoParam.GetRect().GetRight() - m_videoParam.GetRect().GetLeft(),
+				m_videoParam.GetRect().GetBottom() - m_videoParam.GetRect().GetTop()
+			);
+
+			InvalidateRect(rect);
+			UpdateRegion();
+			OverrideSkyColor(TRUE);
+
+			m_unk0xe4 = TRUE;
+			m_unk0x500 = FALSE;
+		}
+	}
+
+	if (p_enable) {
+		m_displaySurface->GetVideoParam().Flags().SetF1bit3(p_scale);
+	}
+	else {
+		m_displaySurface->GetVideoParam().Flags().SetF1bit3(FALSE);
+	}
 }
 
 // FUNCTION: LEGO1 0x1007c440
@@ -97,6 +140,12 @@ void LegoVideoManager::SetSkyColor(float p_red, float p_green, float p_blue)
 	// m_3dManager->m_pViewport->VTable0x1c(red, green, blue)
 }
 
+// FUNCTION: LEGO1 0x1007c4c0
+void LegoVideoManager::OverrideSkyColor(MxBool p_shouldOverride)
+{
+	this->m_videoParam.GetPalette()->SetOverrideSkyColor(p_shouldOverride);
+}
+
 // STUB: LEGO1 0x1007c560
 int LegoVideoManager::EnableRMDevice()
 {
diff --git a/LEGO1/legovideomanager.h b/LEGO1/legovideomanager.h
index 02558785..11501e2d 100644
--- a/LEGO1/legovideomanager.h
+++ b/LEGO1/legovideomanager.h
@@ -21,20 +21,15 @@ class LegoVideoManager : public MxVideoManager {
 	__declspec(dllexport) void EnableFullScreenMovie(MxBool p_enable, MxBool p_scale);
 	__declspec(dllexport) void MoveCursor(MxS32 p_cursorX, MxS32 p_cursorY);
 
-	inline Lego3DManager* Get3DManager() { return this->m_3dManager; }
-	inline MxDirect3D* GetDirect3D() { return this->m_direct3d; }
+	virtual void Destroy() override; // vtable+0x18
 
 	void SetSkyColor(float p_red, float p_green, float p_blue);
+	void OverrideSkyColor(MxBool p_shouldOverride);
+
+	inline Lego3DManager* Get3DManager() { return this->m_3dManager; }
+	inline MxDirect3D* GetDirect3D() { return this->m_direct3d; }
 	inline void SetUnkE4(MxBool p_unk0xe4) { this->m_unk0xe4 = p_unk0xe4; }
 
-	// FUNCTION: LEGO1 0x1007c4c0
-	void OverrideSkyColor(MxBool p_shouldOverride)
-	{
-		this->m_videoParam.GetPalette()->SetOverrideSkyColor(p_shouldOverride);
-	}
-
-	virtual void Destroy() override; // vtable+0x18
-
 private:
 	undefined4 m_unk0x64;
 	Lego3DManager* m_3dManager; // 0x68
diff --git a/LEGO1/mxdisplaysurface.cpp b/LEGO1/mxdisplaysurface.cpp
index 957bc568..bc1d2078 100644
--- a/LEGO1/mxdisplaysurface.cpp
+++ b/LEGO1/mxdisplaysurface.cpp
@@ -28,10 +28,47 @@ void MxDisplaySurface::Reset()
 	memset(&this->m_surfaceDesc, 0, sizeof(this->m_surfaceDesc));
 }
 
-// STUB: LEGO1 0x100ba640
+// FUNCTION: LEGO1 0x100ba640
 void MxDisplaySurface::FUN_100ba640()
 {
-	// TODO
+	MxS32 backBuffers;
+	DDSURFACEDESC desc;
+	HRESULT hr;
+
+	if (!m_videoParam.Flags().GetFlipSurfaces()) {
+		backBuffers = 1;
+	}
+	else {
+		backBuffers = m_videoParam.GetBackBuffers() + 1;
+	}
+
+	for (MxS32 i = 0; i < backBuffers; i++) {
+		memset(&desc, 0, sizeof(DDSURFACEDESC));
+
+		desc.dwSize = sizeof(DDSURFACEDESC);
+		hr = m_ddSurface2->Lock(NULL, &desc, DDLOCK_WAIT, NULL);
+		if (hr == DDERR_SURFACELOST) {
+			m_ddSurface2->Restore();
+			hr = m_ddSurface2->Lock(NULL, &desc, DDLOCK_WAIT, NULL);
+		}
+
+		if (hr != S_OK) {
+			return;
+		}
+
+		MxU8* surface = (MxU8*) desc.lpSurface;
+		MxS32 height = m_videoParam.GetRect().GetHeight();
+
+		while (height--) {
+			memset(surface, 0, m_videoParam.GetRect().GetWidth() * desc.ddpfPixelFormat.dwRGBBitCount / 8);
+			surface += desc.lPitch;
+		}
+
+		m_ddSurface2->Unlock(desc.lpSurface);
+		if (m_videoParam.Flags().GetFlipSurfaces()) {
+			m_ddSurface1->Flip(NULL, 1);
+		}
+	}
 }
 
 // FUNCTION: LEGO1 0x100ba790
diff --git a/LEGO1/mxdisplaysurface.h b/LEGO1/mxdisplaysurface.h
index 280100f4..3d386bb4 100644
--- a/LEGO1/mxdisplaysurface.h
+++ b/LEGO1/mxdisplaysurface.h
@@ -69,6 +69,7 @@ class MxDisplaySurface : public MxCore {
 
 	inline LPDIRECTDRAWSURFACE GetDirectDrawSurface1() { return this->m_ddSurface1; }
 	inline LPDIRECTDRAWSURFACE GetDirectDrawSurface2() { return this->m_ddSurface2; }
+	inline MxVideoParam& GetVideoParam() { return this->m_videoParam; }
 
 private:
 	MxVideoParam m_videoParam;
diff --git a/LEGO1/mxpalette.h b/LEGO1/mxpalette.h
index d63b061c..90ffa605 100644
--- a/LEGO1/mxpalette.h
+++ b/LEGO1/mxpalette.h
@@ -25,6 +25,7 @@ class MxPalette : public MxCore {
 	MxResult SetSkyColor(LPPALETTEENTRY p_skyColor);
 	void Reset(MxBool p_ignoreSkyColor);
 	LPDIRECTDRAWPALETTE CreateNativePalette();
+
 	inline void SetOverrideSkyColor(MxBool p_value) { this->m_overrideSkyColor = p_value; }
 
 private: