Add new `STARTUP` lump, for the splash screen

src/console.c

@@ -1677,8 +1677,12 @@ static void CON_DrawBackpic(void)
 	lumpnum_t piclump;
 	int x, w, h;
 
-	// Get the lumpnum for CONSBACK, or fallback into MISSING.
-	piclump = W_CheckNumForName("CONSBACK");
+	// Get the lumpnum for CONSBACK, STARTUP (Only during game startup) or fallback into MISSING.
+	if (con_startup)
+		piclump = W_CheckNumForName("STARTUP");
+	else
+		piclump = W_CheckNumForName("CONSBACK");
+
 	if (piclump == LUMPERROR)
 		piclump = W_GetNumForName("MISSING");
 

src/d_main.c

@@ -768,7 +768,7 @@ void D_SRB2Loop(void)
 	*/
 	/* Smells like a hack... Don't fade Sonic's ass into the title screen. */
 	if (gamestate != GS_TITLESCREEN)
-		V_DrawScaledPatch(0, 0, 0, W_CachePatchNum(W_GetNumForName("CONSBACK"), PU_PATCH));
+		V_DrawScaledPatch(0, 0, 0, W_CachePatchNum(W_GetNumForName("STARTUP"), PU_PATCH));
 
 	for (;;)
 	{