diff --git a/Source/gendung.cpp b/Source/gendung.cpp
index dbf717ebe..527533590 100644
--- a/Source/gendung.cpp
+++ b/Source/gendung.cpp
@@ -33,10 +33,6 @@ ScrollStruct ScrollInfo;
 BYTE *pDungeonCels;
 THEME_LOC themeLoc[MAXTHEMES];
 char dPlayer[MAXDUNX][MAXDUNY];
-int dword_5C2FF8;
-int dword_5C2FFC;
-int scr_pix_width;
-int scr_pix_height;
 char dArch[MAXDUNX][MAXDUNY];
 BOOLEAN nBlockTable[2049];
 BYTE *pSpecialCels;
@@ -147,18 +143,6 @@ void SetDungeonMicros()
 			}
 		}
 	}
-
-	if (zoomflag) {
-		scr_pix_width = SCREEN_WIDTH;
-		scr_pix_height = VIEWPORT_HEIGHT;
-		dword_5C2FF8 = SCREEN_WIDTH / 64;
-		dword_5C2FFC = VIEWPORT_HEIGHT / 32;
-	} else {
-		scr_pix_width = ZOOM_WIDTH;
-		scr_pix_height = ZOOM_HEIGHT;
-		dword_5C2FF8 = ZOOM_WIDTH / 64;
-		dword_5C2FFC = ZOOM_HEIGHT / 32;
-	}
 }
 
 void DRLG_InitTrans()
diff --git a/Source/gendung.h b/Source/gendung.h
index 6f79f2a3b..56d636c87 100644
--- a/Source/gendung.h
+++ b/Source/gendung.h
@@ -33,10 +33,6 @@ extern ScrollStruct ScrollInfo;
 extern BYTE *pDungeonCels;
 extern THEME_LOC themeLoc[MAXTHEMES];
 extern char dPlayer[MAXDUNX][MAXDUNY];
-extern int dword_5C2FF8;
-extern int dword_5C2FFC;
-extern int scr_pix_width;
-extern int scr_pix_height;
 extern char dArch[MAXDUNX][MAXDUNY];
 extern BOOLEAN nBlockTable[2049];
 extern BYTE *pSpecialCels;
diff --git a/Source/render.cpp b/Source/render.cpp
index b2334a11c..87f20ea3d 100644
--- a/Source/render.cpp
+++ b/Source/render.cpp
@@ -264,26 +264,27 @@ void RenderTile(BYTE *pBuff)
 	}
 }
 
-void world_draw_black_tile(BYTE *pBuff)
+void world_draw_black_tile(int sx, int sy)
 {
 	int i, j, k;
 	BYTE *dst;
 
-	dst = pBuff;
+	if (sx >= SCREEN_WIDTH - 64 || sy >= SCREEN_HEIGHT - 32)
+		return;
+
+	dst = &gpBuffer[sx + BUFFER_WIDTH * sy];
 
 	for (i = 30, j = 1; i >= 0; i -= 2, j++, dst -= BUFFER_WIDTH + 64) {
 		dst += i;
-		if (dst < gpBufEnd) {
-			for (k = 0; k < 4 * j; k++)
-				*dst++ = 0;
+		for (k = 0; k < 4 * j; k++) {
+			*dst++ = 0;
 		}
 		dst += i;
 	}
 	for (i = 2, j = 15; i != 32; i += 2, j--, dst -= BUFFER_WIDTH + 64) {
 		dst += i;
-		if (dst < gpBufEnd) {
-			for (k = 0; k < 4 * j; k++)
-				*dst++ = 0;
+		for (k = 0; k < 4 * j; k++) {
+			*dst++ = 0;
 		}
 		dst += i;
 	}
diff --git a/Source/render.h b/Source/render.h
index 8b20e012c..584cc4af7 100644
--- a/Source/render.h
+++ b/Source/render.h
@@ -4,6 +4,6 @@
 void RenderTile(BYTE *pBuff);
 #define drawUpperScreen(p) RenderTile(p)
 #define drawLowerScreen(p) RenderTile(p)
-void world_draw_black_tile(BYTE *pBuff);
+void world_draw_black_tile(int sx, int sy);
 
 #endif /* __RENDER_H__ */
diff --git a/Source/scrollrt.cpp b/Source/scrollrt.cpp
index 8873e0e8f..f642e39da 100644
--- a/Source/scrollrt.cpp
+++ b/Source/scrollrt.cpp
@@ -683,7 +683,6 @@ static void scrollrt_draw(int x, int y, int sx, int sy, int chunks, int dPieceRo
 		chunks++;
 	}
 
-
 	for (j = 0; j < chunks; j++) {
 		if (y >= 0 && y < MAXDUNY && x >= 0 && x < MAXDUNX) {
 			level_piece_id = dPiece[x][y];
@@ -692,32 +691,29 @@ static void scrollrt_draw(int x, int y, int sx, int sy, int chunks, int dPieceRo
 				dst = &gpBuffer[sx + sy * BUFFER_WIDTH];
 				pMap = &dpiece_defs_map_2[x][y];
 				cel_transparency_active = (BYTE)(nTransTable[level_piece_id] & TransList[dTransVal[x][y]]);
-				arch_draw_type = 1;
-				level_cel_block = pMap->mt[0];
-				if (level_cel_block != 0) {
-					drawUpperScreen(dst);
-				}
-				arch_draw_type = 2;
-				level_cel_block = pMap->mt[1];
-				if (level_cel_block != 0) {
-					drawUpperScreen(dst + 32);
-				}
-				arch_draw_type = 0;
-				for (i = 1; i < (MicroTileLen >> 1) - 1; i++) {
-					dst -= BUFFER_WIDTH * 32;
+				for (i = 0; i<MicroTileLen>> 1; i++) {
+					arch_draw_type = i == 0 ? 1 : 0;
 					level_cel_block = pMap->mt[2 * i];
 					if (level_cel_block != 0) {
 						drawUpperScreen(dst);
 					}
+					arch_draw_type = i == 0 ? 2 : 0;
 					level_cel_block = pMap->mt[2 * i + 1];
 					if (level_cel_block != 0) {
 						drawUpperScreen(dst + 32);
 					}
+					dst -= BUFFER_WIDTH * 32;
+				}
+				if (leveltype != DTYPE_TOWN) {
+					scrollrt_draw_dungeon(&gpBuffer[sx + BUFFER_WIDTH * sy], x, y, sx, sy, 1);
+				} else {
+					town_draw_town_all(&gpBuffer[sx + BUFFER_WIDTH * sy], x, y, sx, sy, 1);
 				}
-				scrollrt_draw_dungeon(&gpBuffer[sx + BUFFER_WIDTH * sy], x, y, sx, sy, 1);
 			} else {
-				world_draw_black_tile(&gpBuffer[sx + BUFFER_WIDTH * sy]);
+				world_draw_black_tile(sx, sy);
 			}
+		} else {
+			world_draw_black_tile(sx, sy);
 		}
 		x++;
 		y--;
@@ -815,11 +811,7 @@ static void DrawGame(int x, int y)
 	/// ASSERT: assert(gpBuffer);
 	gpBufEnd = &gpBuffer[BUFFER_WIDTH * (VIEWPORT_HEIGHT + SCREEN_Y)];
 	for (i = 0; i < (blocks << 1); i++) {
-		if (leveltype != DTYPE_TOWN) {
-			scrollrt_draw(x, y, sx, sy, chunks, i);
-		} else {
-			town_draw(x, y, sx, sy, chunks, i);
-		}
+		scrollrt_draw(x, y, sx, sy, chunks, i);
 		sy += 16;
 		if (i & 1)
 			y++;
diff --git a/Source/town.cpp b/Source/town.cpp
index 297a052d9..e4b385c43 100644
--- a/Source/town.cpp
+++ b/Source/town.cpp
@@ -109,51 +109,6 @@ void town_draw_town_all(BYTE *pBuff, int x, int y, int sx, int sy, int eflag)
 	}
 }
 
-void town_draw(int x, int y, int sx, int sy, int chunks, int dPieceRow)
-{
-	int i, j;
-	BYTE *dst;
-	MICROS *pMap;
-
-	/// ASSERT: assert(gpBuffer);
-
-	if (dPieceRow & 1) {
-		x--;
-		y++;
-		sx -= 32;
-		chunks++;
-	}
-
-	for (j = 0; j < chunks; j++) {
-		if (y >= 0 && y < MAXDUNY && x >= 0 && x < MAXDUNX) {
-			level_cel_block = dPiece[x][y];
-			if (level_cel_block != 0) {
-				dst = &gpBuffer[sx + BUFFER_WIDTH * sy];
-				pMap = &dpiece_defs_map_2[x][y];
-				for (i = 0; i < MicroTileLen >> 1; i++) {
-					level_cel_block = pMap->mt[2 * i];
-					if (level_cel_block != 0) {
-						drawUpperScreen(dst);
-					}
-					level_cel_block = pMap->mt[2 * i + 1];
-					if (level_cel_block != 0) {
-						drawUpperScreen(dst + 32);
-					}
-					dst -= BUFFER_WIDTH * 32;
-				}
-				town_draw_town_all(&gpBuffer[sx + BUFFER_WIDTH * sy], x, y, sx, sy, 1);
-			} else {
-				world_draw_black_tile(&gpBuffer[sx + BUFFER_WIDTH * sy]);
-			}
-		} else {
-			world_draw_black_tile(&gpBuffer[sx + BUFFER_WIDTH * sy]);
-		}
-		x++;
-		y--;
-		sx += 64;
-	}
-}
-
 void SetTownMicros()
 {
 	int i, x, y, lv;
@@ -179,14 +134,6 @@ void SetTownMicros()
 			}
 		}
 	}
-
-	if (zoomflag) {
-		scr_pix_width = SCREEN_WIDTH;
-		scr_pix_height = VIEWPORT_HEIGHT;
-	} else {
-		scr_pix_width = ZOOM_WIDTH;
-		scr_pix_height = ZOOM_HEIGHT;
-	}
 }
 
 void T_FillSector(BYTE *P3Tiles, BYTE *pSector, int xi, int yi, int w, int h)
@@ -313,6 +260,7 @@ void CreateTown(int entry)
 	dminy = 10;
 	dmaxx = 84;
 	dmaxy = 84;
+	DRLG_InitTrans();
 
 	if (entry == 0) {
 		ViewX = 75;