diff --git a/deps/iw4-open-formats b/deps/iw4-open-formats
index f25d31a8..c517856c 160000
--- a/deps/iw4-open-formats
+++ b/deps/iw4-open-formats
@@ -1 +1 @@
-Subproject commit f25d31a8946a259d96cbed2e0e432e649f3d24cf
+Subproject commit c517856ce3db12557cf77bf53e27d7a411f03e12
diff --git a/src/Components/Modules/AssetInterfaces/IFxEffectDef.cpp b/src/Components/Modules/AssetInterfaces/IFxEffectDef.cpp
index 978934b6..0d366ce2 100644
--- a/src/Components/Modules/AssetInterfaces/IFxEffectDef.cpp
+++ b/src/Components/Modules/AssetInterfaces/IFxEffectDef.cpp
@@ -8,6 +8,8 @@ namespace Assets
 		if (!header->data)                                   this->loadEfx(header, name, builder);    // Check if we have an editor fx
 		if (!header->data)                                   this->loadFromIW4OF(header, name, builder); // Check if we need to import a new one into the game
 		if (!header->data /*&& !builder->isPrimaryAsset()*/) this->loadNative(header, name, builder); // Check if there is a native one
+
+		assert(header->data);
 	}
 
 	void IFxEffectDef::loadFxElemVisuals(Game::FxElemVisuals* visuals, char elemType, Components::ZoneBuilder::Zone* builder, Utils::Stream::Reader* reader)
diff --git a/src/Components/Modules/AssetInterfaces/IMaterialTechniqueSet.cpp b/src/Components/Modules/AssetInterfaces/IMaterialTechniqueSet.cpp
index cb2fe8b0..c0e81d06 100644
--- a/src/Components/Modules/AssetInterfaces/IMaterialTechniqueSet.cpp
+++ b/src/Components/Modules/AssetInterfaces/IMaterialTechniqueSet.cpp
@@ -12,7 +12,10 @@ namespace Assets
 		if (!header->data) this->loadFromDisk(header, name, builder); // Check if we need to import a new one into the game
 		if (!header->data) this->loadNative(header, name, builder); // Check if there is a native one
 
-		assert(header->data);
+		if (!header->data)
+		{
+			AssertUnreachable;
+		}
 	}
 
 	void IMaterialTechniqueSet::loadNative(Game::XAssetHeader* header, const std::string& name, Components::ZoneBuilder::Zone* /*builder*/)
diff --git a/src/Components/Modules/AssetInterfaces/ISndCurve.cpp b/src/Components/Modules/AssetInterfaces/ISndCurve.cpp
index a4228e67..a3a7a496 100644
--- a/src/Components/Modules/AssetInterfaces/ISndCurve.cpp
+++ b/src/Components/Modules/AssetInterfaces/ISndCurve.cpp
@@ -26,5 +26,10 @@ namespace Assets
 	void ISndCurve::load(Game::XAssetHeader* header, const std::string& name, Components::ZoneBuilder::Zone* builder)
 	{
 		header->sndCurve = builder->getIW4OfApi()->read<Game::SndCurve>(Game::XAssetType::ASSET_TYPE_SOUND_CURVE, name);
+
+		if (!header->sndCurve)
+		{
+			header->sndCurve = Components::AssetHandler::FindOriginalAsset(Game::XAssetType::ASSET_TYPE_SOUND_CURVE, name.data()).sndCurve;
+		}
 	}
 }
diff --git a/src/Components/Modules/AssetInterfaces/Isnd_alias_list_t.cpp b/src/Components/Modules/AssetInterfaces/Isnd_alias_list_t.cpp
index 9d321160..76b21b2b 100644
--- a/src/Components/Modules/AssetInterfaces/Isnd_alias_list_t.cpp
+++ b/src/Components/Modules/AssetInterfaces/Isnd_alias_list_t.cpp
@@ -8,6 +8,11 @@ namespace Assets
 	void Isnd_alias_list_t::load(Game::XAssetHeader* header, const std::string& name, Components::ZoneBuilder::Zone* builder)
 	{
 		header->sound = builder->getIW4OfApi()->read<Game::snd_alias_list_t>(Game::XAssetType::ASSET_TYPE_SOUND, name);
+		
+		if (!header->sound)
+		{
+			header->sound = Components::AssetHandler::FindOriginalAsset(Game::XAssetType::ASSET_TYPE_SOUND_CURVE, name.data()).sound;
+		}
 	}
 
 	void Isnd_alias_list_t::mark(Game::XAssetHeader header, Components::ZoneBuilder::Zone* builder)
diff --git a/src/Components/Modules/ZoneBuilder.cpp b/src/Components/Modules/ZoneBuilder.cpp
index 6d07155f..5e4f7386 100644
--- a/src/Components/Modules/ZoneBuilder.cpp
+++ b/src/Components/Modules/ZoneBuilder.cpp
@@ -761,7 +761,9 @@ namespace Components
 
 	iw4of::params_t ZoneBuilder::Zone::getIW4OfApiParams()
 	{
-		iw4of::params_t params;
+		iw4of::params_t params{};
+
+		params.write_only_once = true;
 
 		params.find_other_asset = [this](int type, const std::string& name) -> void*
 		{