diff --git a/flixel/addons/display/FlxBackdrop.hx b/flixel/addons/display/FlxBackdrop.hx
index 90731e13..cdc498a5 100644
--- a/flixel/addons/display/FlxBackdrop.hx
+++ b/flixel/addons/display/FlxBackdrop.hx
@@ -113,6 +113,9 @@ class FlxBackdrop extends FlxSprite
 			drawToLargestCamera();
 		}
 		
+		#if (flixel >= "5.7.0")
+		final cameras = getCamerasLegacy();
+		#end
 		for (camera in cameras)
 		{
 			if (!camera.visible || !camera.exists || !isOnScreen(camera))
@@ -156,6 +159,9 @@ class FlxBackdrop extends FlxSprite
 	{
 		var largest:FlxCamera = null;
 		var largestArea = 0.0;
+		#if (flixel >= "5.7.0")
+		final cameras = getCamerasLegacy(); // else use this.cameras
+		#end
 		for (camera in cameras)
 		{
 			if (!camera.visible || !camera.exists || !isOnScreen(camera))
diff --git a/flixel/addons/display/FlxSliceSprite.hx b/flixel/addons/display/FlxSliceSprite.hx
index 24dfbe1e..a948ec39 100644
--- a/flixel/addons/display/FlxSliceSprite.hx
+++ b/flixel/addons/display/FlxSliceSprite.hx
@@ -511,7 +511,7 @@ class FlxSliceSprite extends FlxStrip
 			renderSprite.y = y;
 			renderSprite.scale.copyFrom(scale);
 			renderSprite.scrollFactor.set(scrollFactor.x, scrollFactor.y);
-			renderSprite.cameras = cameras;
+			renderSprite._cameras = _cameras;
 			renderSprite.draw();
 		}
 		else
diff --git a/flixel/addons/display/FlxTiledSprite.hx b/flixel/addons/display/FlxTiledSprite.hx
index b47b8efe..4fe74730 100644
--- a/flixel/addons/display/FlxTiledSprite.hx
+++ b/flixel/addons/display/FlxTiledSprite.hx
@@ -144,7 +144,7 @@ class FlxTiledSprite extends FlxStrip
 			renderSprite.x = x;
 			renderSprite.y = y;
 			renderSprite.scrollFactor.set(scrollFactor.x, scrollFactor.y);
-			renderSprite.cameras = cameras;
+			renderSprite._cameras = _cameras;
 			renderSprite.draw();
 		}
 		else
diff --git a/flixel/addons/editors/spine/FlxSpine.hx b/flixel/addons/editors/spine/FlxSpine.hx
index bd95dcd2..7851c57c 100644
--- a/flixel/addons/editors/spine/FlxSpine.hx
+++ b/flixel/addons/editors/spine/FlxSpine.hx
@@ -268,7 +268,7 @@ class FlxSpine extends FlxSprite
 				{
 					wrapper.x = 0;
 					wrapper.y = 0;
-					wrapper.cameras = cameras;
+					wrapper._cameras = _cameras;
 
 					#if (flash || openfl >= "4.0.0")
 					wrapper.vertices.length = verticesLength;
diff --git a/flixel/addons/effects/FlxTrail.hx b/flixel/addons/effects/FlxTrail.hx
index 186637fa..6f5112b1 100644
--- a/flixel/addons/effects/FlxTrail.hx
+++ b/flixel/addons/effects/FlxTrail.hx
@@ -4,7 +4,7 @@ import flixel.animation.FlxAnimation;
 import flixel.FlxG;
 import flixel.FlxSprite;
 import flixel.group.FlxGroup;
-import flixel.group.FlxSpriteGroup;
+import flixel.group.*;
 import flixel.system.FlxAssets;
 import flixel.util.FlxArrayUtil;
 import flixel.util.FlxDestroyUtil;
@@ -17,7 +17,7 @@ import flixel.math.FlxPoint;
  * Feel free to use this class and adjust it to your needs.
  * @author Gama11
  */
-class FlxTrail extends FlxSpriteGroup
+class FlxTrail extends #if (flixel < "5.7.0") FlxSpriteGroup #else FlxSpriteContainer #end
 {
 	/**
 	 * Stores the FlxSprite the trail is attached to.
diff --git a/flixel/addons/transition/TransitionEffect.hx b/flixel/addons/transition/TransitionEffect.hx
index fda10cc2..281d7af7 100644
--- a/flixel/addons/transition/TransitionEffect.hx
+++ b/flixel/addons/transition/TransitionEffect.hx
@@ -3,14 +3,14 @@ package flixel.addons.transition;
 import flixel.addons.transition.FlxTransitionSprite.TransitionStatus;
 import flixel.addons.transition.TransitionData;
 import flixel.group.FlxGroup;
-import flixel.group.FlxSpriteGroup;
+import flixel.group.*;
 import flixel.util.FlxTimer;
 
 /**
  * @author larsiusprime
  */
 @:allow(flixel.addons.transition.Transition)
-class TransitionEffect extends FlxSpriteGroup
+class TransitionEffect extends #if (flixel < "5.7.0") FlxSpriteGroup #else FlxSpriteContainer #end
 {
 	public var finishCallback:Void->Void;
 	public var finished(default, null):Bool = false;
diff --git a/flixel/addons/ui/FlxButtonPlus.hx b/flixel/addons/ui/FlxButtonPlus.hx
index 2b13ca15..a2d2b93c 100644
--- a/flixel/addons/ui/FlxButtonPlus.hx
+++ b/flixel/addons/ui/FlxButtonPlus.hx
@@ -9,7 +9,7 @@ import flixel.FlxCamera;
 import flixel.FlxG;
 import flixel.FlxSprite;
 import flixel.graphics.FlxGraphic;
-import flixel.group.FlxSpriteGroup;
+import flixel.group.*;
 import flixel.text.FlxText;
 import flixel.util.FlxColor;
 import flixel.util.FlxDestroyUtil;
@@ -24,7 +24,7 @@ import flixel.math.FlxMath;
  * @link http://www.photonstorm.com
  * @author Richard Davey / Photon Storm
  */
-class FlxButtonPlus extends FlxSpriteGroup
+class FlxButtonPlus extends #if (flixel < "5.7.0") FlxSpriteGroup #else FlxSpriteContainer #end
 {
 	public static inline var NORMAL:Int = 0;
 	public static inline var HIGHLIGHT:Int = 1;
diff --git a/flixel/addons/ui/FlxClickArea.hx b/flixel/addons/ui/FlxClickArea.hx
index 8658b4a3..025d245f 100644
--- a/flixel/addons/ui/FlxClickArea.hx
+++ b/flixel/addons/ui/FlxClickArea.hx
@@ -127,6 +127,9 @@ class FlxClickArea extends FlxObject
 		if (continueUpdate)
 		{
 			var offAll:Bool = true;
+			#if (flixel >= "5.7.0")
+			final cameras = getCameras(); // else use this.cameras
+			#end
 			for (camera in cameras)
 			{
 				#if FLX_MOUSE
diff --git a/flixel/addons/ui/FlxSlider.hx b/flixel/addons/ui/FlxSlider.hx
index 360f1f62..9522d8e4 100644
--- a/flixel/addons/ui/FlxSlider.hx
+++ b/flixel/addons/ui/FlxSlider.hx
@@ -3,20 +3,20 @@ package flixel.addons.ui;
 #if FLX_MOUSE
 import flixel.FlxG;
 import flixel.FlxSprite;
-import flixel.group.FlxSpriteGroup;
-import flixel.text.FlxText;
-import flixel.util.FlxDestroyUtil;
+import flixel.group.*;
 import flixel.math.FlxMath;
 import flixel.math.FlxPoint;
 import flixel.math.FlxRect;
-import flixel.util.FlxSpriteUtil;
+import flixel.text.FlxText;
 import flixel.util.FlxColor;
+import flixel.util.FlxDestroyUtil;
+import flixel.util.FlxSpriteUtil;
 
 /**
  * A slider GUI element for float and integer manipulation.
  * @author Gama11
  */
-class FlxSlider extends FlxSpriteGroup
+class FlxSlider extends #if (flixel < "5.7.0") FlxSpriteGroup #else FlxSpriteContainer #end
 {
 	/**
 	 * The horizontal line in the background.
@@ -271,7 +271,11 @@ class FlxSlider extends FlxSpriteGroup
 	override public function update(elapsed:Float):Void
 	{
 		// Clicking and sound logic
-		if (FlxMath.mouseInFlxRect(false, _bounds))
+		#if (flixel >= "5.7.0")
+		final camera = getCameras()[0];// else use this.camera
+		#end
+		final mouse = FlxG.mouse.getScreenPosition(camera);
+		if (FlxMath.pointInFlxRect(mouse.x, mouse.y, _bounds))
 		{
 			if (hoverAlpha != 1)
 			{