diff --git a/inc/main.h b/inc/main.h
index 69583c4..bdd0d4a 100644
--- a/inc/main.h
+++ b/inc/main.h
@@ -30,6 +30,7 @@
 
 extern BOOL ShowDriverWarning;
 extern RECT WindowRect;
+extern BOOL ChildWindowExists;
 
 BOOL detect_cutscene();
 void LimitGameTicks(BOOL isBltOrFlip);
diff --git a/inc/opengl.h b/inc/opengl.h
index 39961d4..ce46f55 100644
--- a/inc/opengl.h
+++ b/inc/opengl.h
@@ -51,6 +51,7 @@ extern PFNGLGETSTRINGPROC glGetString;
 extern PFNGLGETTEXIMAGEPROC glGetTexImage;
 extern PFNGLPIXELSTOREIPROC glPixelStorei;
 extern PFNGLENABLEPROC glEnable;
+extern PFNGLCLEARPROC glClear;
 
 extern PFNGLCREATEPROGRAMPROC glCreateProgram;
 extern PFNGLDELETEPROGRAMPROC glDeleteProgram;
diff --git a/src/main.c b/src/main.c
index b986535..664de05 100644
--- a/src/main.c
+++ b/src/main.c
@@ -47,6 +47,7 @@ RECT WindowRect = { .left = -32000, .top = -32000, .right = 0, .bottom = 0 };
 int WindowState = -1;
 BOOL Direct3D9Active;
 BOOL GameHandlesClose;
+BOOL ChildWindowExists;
 
 //BOOL WINAPI DllMainCRTStartup(HINSTANCE hinstDLL, DWORD dwReason, LPVOID lpvReserved)
 BOOL WINAPI DllMain(HANDLE hDll, DWORD dwReason, LPVOID lpReserved)
@@ -106,6 +107,8 @@ BOOL WINAPI DllMain(HANDLE hDll, DWORD dwReason, LPVOID lpReserved)
 
 BOOL CALLBACK EnumChildProc(HWND hWnd, LPARAM lParam)
 {
+    ChildWindowExists = TRUE;
+
     IDirectDrawSurfaceImpl *this = (IDirectDrawSurfaceImpl *)lParam;
 
     HDC hDC = GetDC(hWnd);
@@ -567,6 +570,9 @@ HRESULT __stdcall ddraw_SetDisplayMode(IDirectDrawImpl *This, DWORD width, DWORD
             }
         }
     }
+
+    if (!ddraw->hidemouse)
+        This->boxing = This->maintas = maintas = FALSE;
     
     This->render.viewport.width = This->render.width;
     This->render.viewport.height = This->render.height;
diff --git a/src/opengl.c b/src/opengl.c
index 7deb1b0..a13332a 100644
--- a/src/opengl.c
+++ b/src/opengl.c
@@ -20,6 +20,7 @@ PFNGLGETSTRINGPROC glGetString;
 PFNGLGETTEXIMAGEPROC glGetTexImage;
 PFNGLPIXELSTOREIPROC glPixelStorei;
 PFNGLENABLEPROC glEnable;
+PFNGLCLEARPROC glClear;
 
 PFNGLBEGINPROC glBegin;
 PFNGLENDPROC glEnd;
@@ -123,6 +124,7 @@ BOOL OpenGL_LoadDll()
         glGetTexImage = (PFNGLGETTEXIMAGEPROC)GetProcAddress(OpenGL_hModule, "glGetTexImage");
         glPixelStorei = (PFNGLPIXELSTOREIPROC)GetProcAddress(OpenGL_hModule, "glPixelStorei");
         glEnable = (PFNGLENABLEPROC)GetProcAddress(OpenGL_hModule, "glEnable");
+        glClear = (PFNGLCLEARPROC)GetProcAddress(OpenGL_hModule, "glClear");
 
         glBegin = (PFNGLBEGINPROC)GetProcAddress(OpenGL_hModule, "glBegin");
         glEnd = (PFNGLENDPROC)GetProcAddress(OpenGL_hModule, "glEnd");
@@ -133,7 +135,7 @@ BOOL OpenGL_LoadDll()
     return xwglCreateContext && xwglDeleteContext && xwglGetProcAddress && xwglMakeCurrent && glViewport &&
         glBindTexture && glGenTextures && glTexParameteri && glDeleteTextures && glTexImage2D &&
         glDrawElements && glTexSubImage2D && glGetError && glGetString && glGetTexImage && glPixelStorei &&
-        glEnable && glBegin && glEnd && glTexCoord2f && glVertex2f;
+        glEnable && glClear && glBegin && glEnd && glTexCoord2f && glVertex2f;
 }
 
 void OpenGL_Init()
diff --git a/src/render.c b/src/render.c
index c837549..eb5cf8c 100644
--- a/src/render.c
+++ b/src/render.c
@@ -646,7 +646,23 @@ static void Render()
             }
 
             if (!ddraw->hidemouse)
+            {
+                ChildWindowExists = FALSE;
                 EnumChildWindows(ddraw->hWnd, EnumChildProc, (LPARAM)ddraw->primary);
+                
+                if (ddraw->render.width != ddraw->width || ddraw->render.height != ddraw->height)
+                {
+                    if (ChildWindowExists)
+                    {
+                        glClear(GL_COLOR_BUFFER_BIT);
+                        glViewport(0, ddraw->render.height - ddraw->height, ddraw->width, ddraw->height);
+                    }
+                    else
+                        glViewport(
+                            ddraw->render.viewport.x, ddraw->render.viewport.y,
+                            ddraw->render.viewport.width, ddraw->render.viewport.height);
+                }
+            }
         }
 
         LeaveCriticalSection(&ddraw->cs);
@@ -716,9 +732,12 @@ static void Render()
             glActiveTexture(GL_TEXTURE1);
             glBindTexture(GL_TEXTURE_2D, 0);
 
-            glViewport(
-                ddraw->render.viewport.x, ddraw->render.viewport.y,
-                ddraw->render.viewport.width, ddraw->render.viewport.height);
+            if (ChildWindowExists)
+                glViewport(0, ddraw->render.height - ddraw->height, ddraw->width, ddraw->height);
+            else
+                glViewport(
+                    ddraw->render.viewport.x, ddraw->render.viewport.y,
+                    ddraw->render.viewport.width, ddraw->render.viewport.height);
 
             // apply filter
 
diff --git a/src/render_d3d9.c b/src/render_d3d9.c
index 9c54866..e47d6c8 100644
--- a/src/render_d3d9.c
+++ b/src/render_d3d9.c
@@ -25,7 +25,7 @@ static int BitsPerPixel;
 
 static BOOL CreateResources();
 static BOOL SetStates();
-static BOOL UpdateVertices(BOOL inCutscene);
+static BOOL UpdateVertices(BOOL inCutscene, BOOL stretch);
 static void SetMaxFPS();
 
 BOOL Direct3D9_Create()
@@ -170,7 +170,7 @@ static BOOL CreateResources()
         IDirect3DDevice9_CreateVertexBuffer(
             D3dDev, sizeof(CUSTOMVERTEX) * 4, 0, D3DFVF_XYZRHW | D3DFVF_TEX1, D3DPOOL_MANAGED, &VertexBuf, NULL));
 
-    err = err || !UpdateVertices(InterlockedExchangeAdd(&ddraw->incutscene, 0));
+    err = err || !UpdateVertices(InterlockedExchangeAdd(&ddraw->incutscene, 0), TRUE);
 
     int i;
     for (i = 0; i < TEXTURE_COUNT; i++)
@@ -243,13 +243,13 @@ static BOOL SetStates()
     return !err;
 }
 
-static BOOL UpdateVertices(BOOL inCutscene)
+static BOOL UpdateVertices(BOOL inCutscene, BOOL stretch)
 {
-    float vpX = (float)ddraw->render.viewport.x;
-    float vpY = (float)ddraw->render.viewport.y;
+    float vpX = stretch ? (float)ddraw->render.viewport.x : 0.0f;
+    float vpY = stretch ? (float)ddraw->render.viewport.y : 0.0f;
 
-    float vpW = (float)(ddraw->render.viewport.width + ddraw->render.viewport.x);
-    float vpH = (float)(ddraw->render.viewport.height + ddraw->render.viewport.y);
+    float vpW = stretch ? (float)(ddraw->render.viewport.width + ddraw->render.viewport.x) : (float)ddraw->width;
+    float vpH = stretch ? (float)(ddraw->render.viewport.height + ddraw->render.viewport.y) : (float)ddraw->height;
 
     float sH = inCutscene ? ScaleH * ((float)CUTSCENE_HEIGHT / ddraw->height) : ScaleH;
     float sW = inCutscene ? ScaleW * ((float)CUTSCENE_WIDTH / ddraw->width) : ScaleW;
@@ -323,12 +323,12 @@ DWORD WINAPI render_d3d9_main(void)
                 if (detect_cutscene())
                 {
                     if (!InterlockedExchange(&ddraw->incutscene, TRUE))
-                        UpdateVertices(TRUE);
+                        UpdateVertices(TRUE, TRUE);
                 }
                 else
                 {
                     if (InterlockedExchange(&ddraw->incutscene, FALSE))
-                        UpdateVertices(FALSE);
+                        UpdateVertices(FALSE, TRUE);
                 }
             }
 
@@ -377,7 +377,21 @@ DWORD WINAPI render_d3d9_main(void)
             }
 
             if (!ddraw->hidemouse)
+            {
+                ChildWindowExists = FALSE;
                 EnumChildWindows(ddraw->hWnd, EnumChildProc, (LPARAM)ddraw->primary);
+
+                if (ddraw->render.width != ddraw->width || ddraw->render.height != ddraw->height)
+                {
+                    if (ChildWindowExists)
+                    {
+                        IDirect3DDevice9_Clear(D3dDev, 0, NULL, D3DCLEAR_TARGET, D3DCOLOR_XRGB(0, 0, 0), 1.0f, 0);
+                        UpdateVertices(FALSE, FALSE);
+                    }
+                    else
+                        UpdateVertices(FALSE, TRUE);
+                }
+            }
         }
 
         LeaveCriticalSection(&ddraw->cs);
diff --git a/src/render_soft.c b/src/render_soft.c
index b1faf42..9c186c8 100644
--- a/src/render_soft.c
+++ b/src/render_soft.c
@@ -66,6 +66,12 @@ DWORD WINAPI render_soft_main(void)
             if (ddraw->vhack)
                 InterlockedExchange(&ddraw->incutscene, scaleCutscene);
 
+            if (!ddraw->hidemouse)
+            {
+                ChildWindowExists = FALSE;
+                EnumChildWindows(ddraw->hWnd, EnumChildProc, (LPARAM)ddraw->primary);
+            }
+
             if (scaleCutscene)
             {
                 StretchDIBits(
@@ -83,7 +89,7 @@ DWORD WINAPI render_soft_main(void)
                     DIB_RGB_COLORS, 
                     SRCCOPY);
             }
-            else if (ddraw->render.width != ddraw->width || ddraw->render.height != ddraw->height)
+            else if (!ChildWindowExists && (ddraw->render.width != ddraw->width || ddraw->render.height != ddraw->height))
             {
                 StretchDIBits(
                     ddraw->render.hDC, 
@@ -115,10 +121,7 @@ DWORD WINAPI render_soft_main(void)
                     ddraw->primary->surface, 
                     ddraw->primary->bmi, 
                     DIB_RGB_COLORS);
-            }
-
-            if (!ddraw->hidemouse)
-                EnumChildWindows(ddraw->hWnd, EnumChildProc, (LPARAM)ddraw->primary);
+            } 
         }
 
         LeaveCriticalSection(&ddraw->cs);