diff --git a/deps/glutils/include/glutils/glutils.hpp b/deps/glutils/include/glutils/glutils.hpp
index 037c6b4e..bbeac254 100644
--- a/deps/glutils/include/glutils/glutils.hpp
+++ b/deps/glutils/include/glutils/glutils.hpp
@@ -150,8 +150,39 @@ class FrameBufferBind {
 
 void bind(const FrameBuffer &fb) noexcept;
 
+struct ShaderVarSet {
+	GLsizei len{};
+	ox::String name;
+};
 
-ox::Result<GLProgram> buildShaderProgram(ox::CStringView const&vert, ox::CStringView const&frag, ox::CStringView const&geo = "") noexcept;
+struct ProgramSource {
+	ox::Vector<glutils::ShaderVarSet> const shaderParams;
+	GLsizei const rowLen = [this] {
+		GLsizei len{};
+		for (auto const&v : shaderParams) {
+			len += v.len;
+		}
+		return len;
+	}();
+	GLsizei const vboLen = rowLen * 4;
+	ox::String const vertShader{};
+	ox::String const fragShader{};
+	ox::String const geomShader{};
+};
+
+ox::Result<GLProgram> buildShaderProgram(ProgramSource const&src) noexcept;
+
+ox::Result<GLProgram> buildShaderProgram(
+		ox::CStringView const&vert,
+		ox::CStringView const&frag,
+		ox::CStringView const&geo = "") noexcept;
+
+void setupShaderParams(
+		GLProgram const&shader,
+		ox::Vector<ShaderVarSet> const&vars,
+		GLsizei vertexRowLen) noexcept;
+
+void setupShaderParams(GLProgram const&shader, ox::Vector<ShaderVarSet> const&vars) noexcept;
 
 glutils::GLVertexArray generateVertexArrayObject() noexcept;
 
@@ -160,6 +191,8 @@ glutils::GLBuffer generateBuffer() noexcept;
 [[nodiscard]]
 FrameBuffer generateFrameBuffer(int width, int height) noexcept;
 
+void resizeFrameBuffer(FrameBuffer &fb, int width, int height) noexcept;
+
 /**
  * Resizes a FrameBuffer, and creates if it does not already exist.
  */
diff --git a/deps/glutils/src/glutils.cpp b/deps/glutils/src/glutils.cpp
index bd1ca0c8..f1eaf0cf 100644
--- a/deps/glutils/src/glutils.cpp
+++ b/deps/glutils/src/glutils.cpp
@@ -88,6 +88,40 @@ static ox::Result<GLShader> buildShader(
 	return shader;
 }
 
+ox::Result<GLProgram> buildShaderProgram(ProgramSource const&src) noexcept {
+	oxRequireM(program, buildShaderProgram(
+			src.vertShader,
+			src.fragShader,
+			src.geomShader));
+	setupShaderParams(program, src.shaderParams, src.rowLen);
+	return std::move(program);
+}
+
+void setupShaderParams(
+		GLProgram const&shader,
+		ox::Vector<ShaderVarSet> const&vars,
+		GLsizei vertexRowLen) noexcept {
+	// setup vars
+	for (auto lenWritten = 0LU; auto const&v : vars) {
+		auto const attr = static_cast<GLuint>(glGetAttribLocation(shader, v.name.c_str()));
+		glEnableVertexAttribArray(attr);
+		glVertexAttribPointer(
+				attr, v.len, GL_FLOAT, GL_FALSE,
+				vertexRowLen * static_cast<GLsizei>(sizeof(float)),
+				std::bit_cast<void*>(uintptr_t{lenWritten * sizeof(float)}));
+		lenWritten += static_cast<size_t>(v.len);
+	}
+}
+
+void setupShaderParams(GLProgram const&shader, ox::Vector<ShaderVarSet> const&vars) noexcept {
+	// get row len
+	GLsizei vertexRowLen{};
+	for (auto const&v : vars) {
+		vertexRowLen += v.len;
+	}
+	setupShaderParams(shader, vars, vertexRowLen);
+}
+
 ox::Result<GLProgram> buildShaderProgram(
 		ox::CStringView const&vert,
 		ox::CStringView const&frag,
@@ -147,11 +181,7 @@ FrameBuffer generateFrameBuffer(int width, int height) noexcept {
 	return fb;
 }
 
-void resizeInitFrameBuffer(FrameBuffer &fb, int width, int height) noexcept {
-	if (!fb) {
-		fb = generateFrameBuffer(width, height);
-		return;
-	}
+void resizeFrameBuffer(FrameBuffer &fb, int width, int height) noexcept {
 	width = ox::max(1, width);
 	height = ox::max(1, height);
 	fb.width = width;
@@ -171,6 +201,14 @@ void resizeInitFrameBuffer(FrameBuffer &fb, int width, int height) noexcept {
 	glBindRenderbuffer(GL_RENDERBUFFER, 0);
 }
 
+void resizeInitFrameBuffer(FrameBuffer &fb, int width, int height) noexcept {
+	if (!fb) {
+		fb = generateFrameBuffer(width, height);
+		return;
+	}
+	resizeFrameBuffer(fb, width, height);
+}
+
 void resizeInitFrameBuffer(FrameBuffer &fb, ox::Size const&sz) noexcept {
 	resizeInitFrameBuffer(fb, sz.width, sz.height);
 }
diff --git a/deps/ox/src/ox/model/modelvalue.hpp b/deps/ox/src/ox/model/modelvalue.hpp
index 8f3ec13c..82892714 100644
--- a/deps/ox/src/ox/model/modelvalue.hpp
+++ b/deps/ox/src/ox/model/modelvalue.hpp
@@ -334,7 +334,12 @@ consteval bool isVector(const ModelValueVector*) noexcept {
 	return true;
 }
 
+constexpr Error model(auto *h, CommonPtrWith<ModelObject> auto *obj) noexcept;
+constexpr Error model(auto *h, CommonPtrWith<ModelUnion> auto *obj) noexcept;
+
+
 class ModelObject {
+	friend constexpr Error model(auto *h, CommonPtrWith<ModelObject> auto *obj) noexcept;
 	public:
 		struct Field {
 			String name;
@@ -517,7 +522,7 @@ class ModelUnion {
 			String name;
 			ModelValue value;
 		};
-		oxModelFriend(ModelUnion);
+		friend constexpr Error model(auto *h, CommonPtrWith<ModelUnion> auto *obj) noexcept;
 		friend ModelValue;
 		Vector<UniquePtr<Field>> m_fieldsOrder;
 		HashMap<String, Field*> m_fields;
diff --git a/src/nostalgia/modules/core/include/nostalgia/core/tilesheet.hpp b/src/nostalgia/modules/core/include/nostalgia/core/tilesheet.hpp
index bad7451c..06beb9c5 100644
--- a/src/nostalgia/modules/core/include/nostalgia/core/tilesheet.hpp
+++ b/src/nostalgia/modules/core/include/nostalgia/core/tilesheet.hpp
@@ -158,6 +158,12 @@ struct TileSheet {
 [[nodiscard]]
 std::size_t idx(TileSheet::SubSheet const&ss, ox::Point const&pt) noexcept;
 
+[[nodiscard]]
+TileSheet::SubSheet const*getSubsheet(TileSheet const&ts, SubSheetId const id) noexcept;
+
+[[nodiscard]]
+size_t getTileIdx(TileSheet const&ts, SubSheetId id) noexcept;
+
 [[nodiscard]]
 uint8_t getPixel4Bpp(TileSheet::SubSheet const&ss, std::size_t idx) noexcept;
 
diff --git a/src/nostalgia/modules/core/src/studio/tilesheeteditor/tilesheetpixels.cpp b/src/nostalgia/modules/core/src/studio/tilesheeteditor/tilesheetpixels.cpp
index db62fb73..1185f2f0 100644
--- a/src/nostalgia/modules/core/src/studio/tilesheeteditor/tilesheetpixels.cpp
+++ b/src/nostalgia/modules/core/src/studio/tilesheeteditor/tilesheetpixels.cpp
@@ -9,6 +9,37 @@
 
 namespace nostalgia::core {
 
+const glutils::ProgramSource TileSheetPixels::s_programSrc = {
+		.shaderParams = {
+			{
+				.len = 2,
+				.name = ox::String("vPosition"),
+			},
+			{
+				.len = 3,
+				.name = ox::String("vColor"),
+			},
+		},
+		.vertShader = ox::sfmt(R"(
+		{}
+		in vec2 vPosition;
+		in vec3 vColor;
+		out vec3 fColor;
+		uniform vec2 vScroll;
+		void main() {
+			gl_Position = vec4(vPosition + vScroll, 0.0, 1.0);
+			fColor = vColor;
+		})", core::gl::GlslVersion),
+		.fragShader = ox::sfmt(R"(
+		{}
+		in vec3 fColor;
+		out vec4 outColor;
+		void main() {
+			//outColor = vec4(0.0, 0.7, 1.0, 1.0);
+			outColor = vec4(fColor, 1.0);
+		})", core::gl::GlslVersion),
+};
+
 TileSheetPixels::TileSheetPixels(TileSheetEditorModel &model) noexcept: m_model(model) {
 }
 
@@ -17,9 +48,7 @@ void TileSheetPixels::setPixelSizeMod(float sm) noexcept {
 }
 
 ox::Error TileSheetPixels::buildShader() noexcept {
-	auto const Vshad = ox::sfmt(VShad, gl::GlslVersion);
-	auto const Fshad = ox::sfmt(FShad, gl::GlslVersion);
-	return glutils::buildShaderProgram(Vshad, Fshad).moveTo(m_shader);
+	return glutils::buildShaderProgram(s_programSrc).moveTo(m_shader);
 }
 
 void TileSheetPixels::draw(bool update, ox::Vec2 const&scroll) noexcept {
@@ -40,14 +69,7 @@ void TileSheetPixels::initBufferSet(ox::Vec2 const&paneSize) noexcept {
 	m_bufferSet.vbo = glutils::generateBuffer();
 	m_bufferSet.ebo = glutils::generateBuffer();
 	update(paneSize);
-	// vbo layout
-	auto const posAttr = static_cast<GLuint>(glGetAttribLocation(m_shader, "vPosition"));
-	glEnableVertexAttribArray(posAttr);
-	glVertexAttribPointer(posAttr, 2, GL_FLOAT, GL_FALSE, VertexVboRowLength * sizeof(float), nullptr);
-	auto const colorAttr = static_cast<GLuint>(glGetAttribLocation(m_shader, "vColor"));
-	glEnableVertexAttribArray(colorAttr);
-	glVertexAttribPointer(colorAttr, 3, GL_FLOAT, GL_FALSE, VertexVboRowLength * sizeof(float),
-	                      std::bit_cast<void*>(uintptr_t{2 * sizeof(float)}));
+	glutils::setupShaderParams(m_shader, s_programSrc.shaderParams);
 }
 
 void TileSheetPixels::update(ox::Vec2 const&paneSize) noexcept {
@@ -78,14 +100,14 @@ void TileSheetPixels::setPixelBufferObject(
 	y += 1.0f - ymod;
 	auto const r = redf(color), g = greenf(color), b = bluef(color);
 	// don't worry, these memcpys gets optimized to something much more ideal
-	ox::Array<float, VertexVboLength> const vertices = {
+	std::array const vertices = {
 			       x,        y, r, g, b, // bottom left
 			x + xmod,        y, r, g, b, // bottom right
 			x + xmod, y + ymod, r, g, b, // top right
 			       x, y + ymod, r, g, b, // top left
 	};
 	memcpy(vbo, vertices.data(), sizeof(vertices));
-	ox::Array<GLuint, VertexEboLength> const elms = {
+	std::array const elms = {
 			vertexRow + 0, vertexRow + 1, vertexRow + 2,
 			vertexRow + 2, vertexRow + 3, vertexRow + 0,
 	};
@@ -99,7 +121,8 @@ void TileSheetPixels::setBufferObjects(ox::Vec2 const&paneSize) noexcept {
 	auto const width = subSheet.columns * TileWidth;
 	auto const height = subSheet.rows * TileHeight;
 	auto const pixels = static_cast<size_t>(width) * static_cast<size_t>(height);
-	m_bufferSet.vertices.resize(pixels * VertexVboLength);
+	auto const vboLen = static_cast<size_t>(s_programSrc.vboLen);
+	m_bufferSet.vertices.resize(pixels * vboLen);
 	m_bufferSet.elements.resize(pixels * VertexEboLength);
 	// set pixels
 	walkPixels(subSheet, m_model.img().bpp, [&](std::size_t i, uint8_t p) {
@@ -107,9 +130,9 @@ void TileSheetPixels::setBufferObjects(ox::Vec2 const&paneSize) noexcept {
 		auto const pt = idxToPt(static_cast<int>(i), subSheet.columns);
 		auto const fx = static_cast<float>(pt.x);
 		auto const fy = static_cast<float>(pt.y);
-		auto const vbo = &m_bufferSet.vertices[i * VertexVboLength];
+		auto const vbo = &m_bufferSet.vertices[i * vboLen];
 		auto const ebo = &m_bufferSet.elements[i * VertexEboLength];
-		if (i * VertexVboLength + VertexVboLength > m_bufferSet.vertices.size()) {
+		if (i * vboLen + vboLen > m_bufferSet.vertices.size()) {
 			return;
 		}
 		if (i * VertexEboLength + VertexEboLength > m_bufferSet.elements.size()) {
diff --git a/src/nostalgia/modules/core/src/studio/tilesheeteditor/tilesheetpixels.hpp b/src/nostalgia/modules/core/src/studio/tilesheeteditor/tilesheetpixels.hpp
index 89c73d43..f8bc34fd 100644
--- a/src/nostalgia/modules/core/src/studio/tilesheeteditor/tilesheetpixels.hpp
+++ b/src/nostalgia/modules/core/src/studio/tilesheeteditor/tilesheetpixels.hpp
@@ -18,28 +18,9 @@ class TileSheetPixels {
 
 	private:
 		static constexpr auto VertexVboRows = 4;
-		static constexpr auto VertexVboRowLength = 5;
-		static constexpr auto VertexVboLength = VertexVboRows * VertexVboRowLength;
 		static constexpr auto VertexEboLength = 6;
-		static constexpr auto VShad = R"(
-		{}
-		in vec2 vPosition;
-		in vec3 vColor;
-		out vec3 fColor;
-		uniform vec2 vScroll;
-		void main() {
-			gl_Position = vec4(vPosition + vScroll, 0.0, 1.0);
-			fColor = vColor;
-		})";
-		static constexpr auto FShad = R"(
-		{}
-		in vec3 fColor;
-		out vec4 outColor;
-		void main() {
-			//outColor = vec4(0.0, 0.7, 1.0, 1.0);
-			outColor = vec4(fColor, 1.0);
-		})";
 
+		static const glutils::ProgramSource s_programSrc;
 		float m_pixelSizeMod = 1;
 		glutils::GLProgram m_shader;
 		glutils::BufferSet m_bufferSet;
diff --git a/src/nostalgia/modules/core/src/tilesheet.cpp b/src/nostalgia/modules/core/src/tilesheet.cpp
index 21edc35a..67b2c2e0 100644
--- a/src/nostalgia/modules/core/src/tilesheet.cpp
+++ b/src/nostalgia/modules/core/src/tilesheet.cpp
@@ -14,6 +14,44 @@ std::size_t idx(TileSheet::SubSheet const&ss, ox::Point const&pt) noexcept {
 	return ptToIdx(pt, ss.columns);
 }
 
+static TileSheet::SubSheet const*getSubsheet(TileSheet::SubSheet const&ss, SubSheetId const id) noexcept {
+	if (ss.id == id) {
+		return &ss;
+	}
+	for (auto const&child : ss.subsheets) {
+		if (auto out = getSubsheet(child, id)) {
+			return out;
+		}
+	}
+	return {};
+}
+
+TileSheet::SubSheet const*getSubsheet(TileSheet const&ts, SubSheetId const id) noexcept {
+	return getSubsheet(ts.subsheet, id);
+}
+
+static ox::Optional<size_t> getPixelIdx(
+		TileSheet::SubSheet const&ss,
+		SubSheetId const id,
+		size_t idx,
+		int8_t const bpp) noexcept {
+	for (auto const&child : ss.subsheets) {
+		if (child.id == id) {
+			return ox::Optional<size_t>(ox::in_place, idx);
+		}
+		if (auto out = getPixelIdx(child, id, idx, bpp)) {
+			return out;
+		}
+		idx += pixelCnt(ss, bpp);
+	}
+	return {};
+}
+
+size_t getTileIdx(TileSheet const&ts, SubSheetId const id) noexcept {
+	auto const out = getPixelIdx(ts.subsheet, id, 0, ts.bpp);
+	return out.or_value(0) / PixelsPerTile;
+}
+
 uint8_t getPixel4Bpp(TileSheet::SubSheet const&ss, std::size_t idx) noexcept {
 	if (idx & 1) {
 		return ss.pixels[idx / 2] >> 4;
diff --git a/src/olympic/studio/modlib/include/studio/imguiutil.hpp b/src/olympic/studio/modlib/include/studio/imguiutil.hpp
index dc71cbcb..9f4aea25 100644
--- a/src/olympic/studio/modlib/include/studio/imguiutil.hpp
+++ b/src/olympic/studio/modlib/include/studio/imguiutil.hpp
@@ -20,6 +20,14 @@ class IDStackItem {
 		~IDStackItem() noexcept;
 };
 
+class IndentStackItem {
+	private:
+		float m_indent{};
+	public:
+		explicit IndentStackItem(float id) noexcept;
+		~IndentStackItem() noexcept;
+};
+
 void centerNextWindow(turbine::Context &ctx) noexcept;
 
 bool PushButton(ox::CStringView lbl, ImVec2 const&btnSz = BtnSz) noexcept;
diff --git a/src/olympic/studio/modlib/src/imguiutil.cpp b/src/olympic/studio/modlib/src/imguiutil.cpp
index 3f7fc141..67eca2bf 100644
--- a/src/olympic/studio/modlib/src/imguiutil.cpp
+++ b/src/olympic/studio/modlib/src/imguiutil.cpp
@@ -24,6 +24,16 @@ IDStackItem::~IDStackItem() noexcept {
 	ImGui::PopID();
 }
 
+
+IndentStackItem::IndentStackItem(float indent) noexcept: m_indent(indent) {
+	ImGui::Indent(m_indent);
+}
+
+IndentStackItem::~IndentStackItem() noexcept {
+	ImGui::Indent(-m_indent);
+}
+
+
 void centerNextWindow(turbine::Context &ctx) noexcept {
 	auto const sz = turbine::getScreenSize(ctx);
 	auto const screenW = static_cast<float>(sz.width);