diff --git a/indra/newview/llvisualeffect.cpp b/indra/newview/llvisualeffect.cpp
index 0d95d565e2..3a4594ff09 100644
--- a/indra/newview/llvisualeffect.cpp
+++ b/indra/newview/llvisualeffect.cpp
@@ -69,7 +69,6 @@ LLVector4 LLTweenableValueLerp<LLVector4>::get()
 //
 
 LLVfxManager::LLVfxManager()
-	: m_Effects(&cmpEffect)
 {
 }
 
@@ -81,7 +80,7 @@ bool LLVfxManager::addEffect(LLVisualEffect* pEffectInst)
 	if (m_Effects.end() != itEffect)
 		return false;
 
-	m_Effects.insert(pEffectInst);
+	m_Effects.insert(std::upper_bound(m_Effects.begin(), m_Effects.end(), pEffectInst, cmpEffect), pEffectInst);
 	return true;
 }
 
@@ -143,6 +142,18 @@ void LLVfxManager::runEffect(std::function<bool(const LLVisualEffect*)> predicat
 	}
 }
 
+void  LLVfxManager::updateEffect(LLVisualEffect* pEffect, bool fEnabled, U32 nPriority)
+{
+	llassert(m_Effects.end() != std::find(m_Effects.begin(), m_Effects.end(), pEffect));
+
+	if ( (pEffect->getEnabled() != fEnabled) || (pEffect->getPriority() != nPriority) )
+	{
+		pEffect->setEnabled(fEnabled);
+		pEffect->setPriority(nPriority);
+		std::sort(m_Effects.begin(), m_Effects.end(), cmpEffect);
+	}
+}
+
 // static
 bool LLVfxManager::cmpEffect(const LLVisualEffect* pLHS, const LLVisualEffect* pRHS)
 {
@@ -150,7 +161,7 @@ bool LLVfxManager::cmpEffect(const LLVisualEffect* pLHS, const LLVisualEffect* p
 	{
 		// Sort by code, then priority, then memory address
 		return (pLHS->getCode() == pRHS->getCode()) ? (pLHS->getPriority() == pRHS->getPriority() ? pLHS < pRHS
-		                                                                                          : pLHS->getPriority() < pRHS->getPriority())
+		                                                                                          : pLHS->getPriority() > pRHS->getPriority())
 			                                        : pLHS->getCode() < pRHS->getCode();
 	}
 	return (pLHS);
diff --git a/indra/newview/llvisualeffect.h b/indra/newview/llvisualeffect.h
index dc90327fa9..959e0dbc83 100644
--- a/indra/newview/llvisualeffect.h
+++ b/indra/newview/llvisualeffect.h
@@ -71,6 +71,7 @@ struct LLShaderEffectParams : LLVisualEffectParams
 
 class LLVisualEffect
 {
+	friend class LLVfxManager;
 public:
 	LLVisualEffect(LLUUID id, EVisualEffect eCode, EVisualEffectType eType)
 		: m_id(id), m_eCode(eCode), m_eType(eType)
@@ -83,10 +84,12 @@ public:
 	U32               getPriority() const { return m_nPriority; }
 	EVisualEffectType getType() const     { return m_eType;}
 	void              setEnabled(bool enable) { m_fEnabled = enable; }
-	void              setPriority(U32 priority) { m_nPriority = priority; }
 
 	virtual void      run(const LLVisualEffectParams* pParams) = 0;
 
+protected:
+	void              setPriority(U32 priority) { m_nPriority = priority; }
+
 	/*
 	 * Member variables
 	 */
@@ -172,6 +175,7 @@ public:
 	template<typename T> bool removeEffect(const LLUUID& idEffect) { return removeEffect(T::EffectCode, idEffect); }
 	void            runEffect(EVisualEffect eCode, LLVisualEffectParams* pParams = nullptr);
 	void            runEffect(EVisualEffectType eType, LLVisualEffectParams* pParams = nullptr);
+	void            updateEffect(LLVisualEffect* pEffect, bool fEnabled, U32 nPriority);
 protected:
 	void            runEffect(std::function<bool(const LLVisualEffect*)> fnFilter, LLVisualEffectParams* pParams);
 	static bool     cmpEffect(const LLVisualEffect* pLHS, const LLVisualEffect* pRHS);
@@ -180,7 +184,7 @@ protected:
 	 * Member variables
 	 */
 protected:
-	std::set<LLVisualEffect*, decltype(&cmpEffect)> m_Effects;
+	std::vector<LLVisualEffect*> m_Effects;
 };
 
 // ============================================================================