diff --git a/src/jasper/modules/world/src/studio/worldobjectseteditor/worldobjectseteditor-imgui.cpp b/src/jasper/modules/world/src/studio/worldobjectseteditor/worldobjectseteditor-imgui.cpp
index db26fb4..de9b97b 100644
--- a/src/jasper/modules/world/src/studio/worldobjectseteditor/worldobjectseteditor-imgui.cpp
+++ b/src/jasper/modules/world/src/studio/worldobjectseteditor/worldobjectseteditor-imgui.cpp
@@ -130,18 +130,23 @@ void WorldObjectSetEditorImGui::loadObj() noexcept {
 	}
 	auto const&obj = activeObj();
 	auto &nameBuff = m_objEditor.nameBuff;
-	ox::strncpy(nameBuff.data(), obj.name.data(), nameBuff.size());
+	nameBuff = obj.name;
 	m_objEditor.palette = obj.palBank;
 	m_objEditor.frames = obj.frames;
 	m_objEditor.interval = obj.intervalMs;
-	m_subsheet = getSubsheet(*m_tileSheet, obj.subsheetId);
+	m_visibleSubsheet = getSubsheet(*m_tileSheet, obj.subsheetId);
+	auto const subsheetId = !m_visibleSubsheet || m_visibleSubsheet->subsheets.empty() ?
+		obj.subsheetId : m_visibleSubsheet->subsheets[0].id;
+	m_visibleSubsheet = getSubsheet(*m_tileSheet, subsheetId);
 	int w = 0;
 	int h = 0;
-	if (m_subsheet) {
-		w = m_subsheet->columns;
-		h = m_subsheet->rows;
+	if (m_visibleSubsheet) {
+		w = m_visibleSubsheet->columns;
+		h = m_visibleSubsheet->rows;
 	}
-	auto const idx = getTileIdx(*m_tileSheet, obj.subsheetId).or_value(0);
+	auto const idx = getTileIdx(
+		*m_tileSheet,
+		subsheetId).or_value(0);
 	oxLogError(m_colView.setup(
 			m_doc.tilesheet,
 			m_doc.palettes[obj.palBank],
@@ -165,11 +170,11 @@ void WorldObjectSetEditorImGui::drawObjEditor() noexcept {
 	ig::IndentStackItem const indent1{10};
 	ImGui::NewLine();
 	auto &nameBuff = m_objEditor.nameBuff;
-	if (ImGui::InputText("Name", nameBuff.data(), nameBuff.size())) {
+	if (ig::InputText("Name", nameBuff)) {
 		std::ignore = pushCommand<EditObjectName>(
 				m_doc,
 				m_selectedObj,
-				ox::String(nameBuff.data(), ox::strnlen(nameBuff.data(), nameBuff.size())));
+				ox::String{nameBuff});
 	}
 	// SubSheet Selector
 	{
@@ -200,7 +205,7 @@ void WorldObjectSetEditorImGui::drawObjEditor() noexcept {
 		ImGui::EndChild();
 	}
 	// collision map
-	if (m_subsheet) {
+	if (m_visibleSubsheet) {
 		ImGui::NewLine();
 		ImGui::Text("Collision Map:");
 		ig::IndentStackItem const indent2{30};
@@ -208,8 +213,8 @@ void WorldObjectSetEditorImGui::drawObjEditor() noexcept {
 		auto const&fb = m_colView.framebuffer();
 		uintptr_t const buffId = fb.color.id;
 		auto const scale = static_cast<float>(m_colView.scale());
-		auto const width = static_cast<float>(m_subsheet->columns * ncore::TileWidth);
-		auto const height = static_cast<float>(m_subsheet->rows * ncore::TileHeight);
+		auto const width = static_cast<float>(m_visibleSubsheet->columns * ncore::TileWidth);
+		auto const height = static_cast<float>(m_visibleSubsheet->rows * ncore::TileHeight);
 		auto const horzPct = width / 240.f;
 		auto const vertPct = height / 160.f;
 		auto const imageSz = ImVec2{width * scale, height * scale};
diff --git a/src/jasper/modules/world/src/studio/worldobjectseteditor/worldobjectseteditor-imgui.hpp b/src/jasper/modules/world/src/studio/worldobjectseteditor/worldobjectseteditor-imgui.hpp
index cb24178..9eee73a 100644
--- a/src/jasper/modules/world/src/studio/worldobjectseteditor/worldobjectseteditor-imgui.hpp
+++ b/src/jasper/modules/world/src/studio/worldobjectseteditor/worldobjectseteditor-imgui.hpp
@@ -19,7 +19,7 @@ class WorldObjectSetEditorImGui: public studio::Editor {
 		ox::String m_itemPath;
 		WorldObjectSet m_doc;
 		keel::AssetRef<ncore::TileSheet> m_tileSheet;
-		ncore::TileSheet::SubSheet const*m_subsheet = nullptr;
+		ncore::TileSheet::SubSheet const*m_visibleSubsheet = nullptr;
 		ox::Vector<ox::String> m_paletteDisplayNames;
 		size_t m_selectedObj{};
 		size_t m_selectedPal{};
@@ -30,7 +30,7 @@ class WorldObjectSetEditorImGui: public studio::Editor {
 		} m_addPalPopup;
 		CollisionView m_colView{m_sctx};
 		struct {
-			ox::Buffer nameBuff = ox::Buffer(256);
+			ox::IString<256> nameBuff;
 			int frames{};
 			int interval{};
 			size_t palette{};
diff --git a/src/jasper/modules/world/src/worldstatic.cpp b/src/jasper/modules/world/src/worldstatic.cpp
index d9c8bf4..73c26fd 100644
--- a/src/jasper/modules/world/src/worldstatic.cpp
+++ b/src/jasper/modules/world/src/worldstatic.cpp
@@ -11,12 +11,22 @@
 
 namespace jasper::world {
 
-inline void ensureInVec(ox::Vector<ox::FileAddress> &vec, ox::FileAddress const&val) {
+static void ensureInVec(ox::Vector<ox::FileAddress> &vec, ox::FileAddress const&val) {
 	if (!vec.contains(val)) {
 		vec.emplace_back(val);
 	}
 }
 
+// If the root subsheet is not a leaf node, it will return the
+// tile count of the first leaf node that it finds.
+[[nodiscard]]
+static uint8_t subsheetTileCnt(ncore::TileSheet::SubSheet const&ss) noexcept {
+	if (ss.subsheets.empty()) {
+		return static_cast<uint8_t>(ss.size());
+	}
+    return subsheetTileCnt(ss.subsheets[0]);
+}
+
 
 WorldStaticLoader::WorldStaticLoader(keel::Context &kctx, WorldStatic &worldStatic, WorldDoc const&doc):
 	m_kctx{kctx},
@@ -155,7 +165,7 @@ ox::Result<uint8_t> WorldStaticLoader::setupTileResrc(DocObjRef const&docObjRef)
 		.tilesheetIdx = static_cast<uint16_t>(*subsheetOffset),
 		.cbbIdx = m_cbbIt,
 		.tilesheetId = tsIdx,
-		.tileCnt = static_cast<uint8_t>(subsheet->size()),
+		.tileCnt = subsheetTileCnt(*subsheet),
 		.frames = obj->frames,
 	});
 	m_cbbIt += refSet.tileCnt;