- Duke/RR: removed all in-game assignments to g_visibility.

These are remnants of the software renderer which used it to calculate light fading but with the current hardware renderers none of these ever reach the renderer, the values are never used.

source/games/duke/src/actors_lava.cpp

@@ -563,7 +563,6 @@ void thunder(void)
 	{
 		if (testgotpic(RRTILE2577, true))
 		{
-			g_visibility = 256; // this is an engine variable
 			if (krand() > 65000)
 			{
 				thunderflash = 1;
@@ -573,7 +572,6 @@ void thunder(void)
 		}
 		else
 		{
-			g_visibility = p->visibility;
 			brightness = ud.brightness >> 2;
 		}
 	}
@@ -585,7 +583,6 @@ void thunder(void)
 			thunderflash = 0;
 			brightness = ud.brightness >> 2;
 			thunder_brightness = brightness;
-			g_visibility = p->visibility;
 		}
 	}
 	if (!winderflash)
@@ -620,24 +617,6 @@ void thunder(void)
 	{
 		r1 = krand() & 4;
 		brightness += r1;
-		switch (r1)
-		{
-		case 0:
-			g_visibility = 2048;
-			break;
-		case 1:
-			g_visibility = 1024;
-			break;
-		case 2:
-			g_visibility = 512;
-			break;
-		case 3:
-			g_visibility = 256;
-			break;
-		default:
-			g_visibility = 4096;
-			break;
-		}
 		if (brightness > 8)
 			brightness = 0;
 		thunder_brightness = brightness;

source/games/duke/src/player_d.cpp

@@ -2558,8 +2558,6 @@ static void operateweapon(int snum, ESyncBits actions)
 			if (p->cursector->lotag != 2) 
 			{
 				p->ammo_amount[FLAMETHROWER_WEAPON]--;
-				if (snum == screenpeek)
-					g_visibility = 0;
 				fi.shoot(pact, FIREBALL);
 			}
 			checkavailweapon(p);

source/games/duke/src/premap_r.cpp

@@ -768,10 +768,6 @@ void prelevel_r(int g, TArray<DDukeActor*>& actors)
 		}
 	}
 	thunder_brightness = 0;
-	if (!thunderon)
-	{
-		g_visibility = p->visibility;
-	}
  }