diff --git a/dGame/Entity.cpp b/dGame/Entity.cpp
index 04f42550a..959b180ad 100644
--- a/dGame/Entity.cpp
+++ b/dGame/Entity.cpp
@@ -1133,6 +1133,12 @@ void Entity::SetGMLevel(eGameMasterLevel value) {
 	}
 }
 
+bool Entity::IsVarSentToClient(const std::u16string& name) const {
+	if (GetComponent<ModelComponent>() && !GetComponent<PetComponent>()) return m_Settings.values.contains(name);
+	const auto& syncLDF = GetVar<std::vector<std::u16string>>(u"syncLDF");
+	return std::ranges::find(syncLDF, name) != syncLDF.end();
+}
+
 void Entity::WriteLDFData(const LwoNameValue& ldf, RakNet::BitStream& outBitStream) const {
 	RakNet::BitStream settingStream;
 	int32_t numberOfValidKeys = ldf.values.size();
diff --git a/dGame/Entity.h b/dGame/Entity.h
index e9618867c..2d28368ec 100644
--- a/dGame/Entity.h
+++ b/dGame/Entity.h
@@ -353,6 +353,9 @@ public:
 	 */
 	std::string GetVarAsString(const std::u16string& name) const;
 
+	// Whether the construction sends this level config key to the client (a model's settings, or syncLDF)
+	bool IsVarSentToClient(const std::u16string& name) const;
+
 	/*
 	 * Collision
 	 */
diff --git a/dGame/dComponents/ScriptComponent.cpp b/dGame/dComponents/ScriptComponent.cpp
index 287b4cba0..d13922e41 100644
--- a/dGame/dComponents/ScriptComponent.cpp
+++ b/dGame/dComponents/ScriptComponent.cpp
@@ -51,6 +51,15 @@ void ScriptComponent::LoadConfigData() {
 
 	m_Client = client && m_ScriptName.empty();
 	SetScript(m_ScriptName);
+
+	// Sent only when the client makes a script component too: its registry script (not one with id 0), or a custom
+	// script in the config the client gets (ApplyScriptComponentIfHasScript 0x01031460, LOT 176 never; the
+	// allocator 0x0104d710). A character's and a server-only custom script stay on the server.
+	const auto clientCustomScript = [this](const std::u16string& key) {
+		return m_Parent->IsVarSentToClient(key) && !m_Parent->GetVarAsString(key).empty();
+	};
+	m_Serialized = (m_ComponentID > 0 && !isCharacter)
+		|| (m_Parent->GetLOT() != 176 && (clientCustomScript(u"custom_script_server") || clientCustomScript(u"custom_script_client")));
 }
 
 void ScriptComponent::Serialize(RakNet::BitStream& outBitStream, bool bIsInitialUpdate) {