diff --git a/src/nostalgia/core/studio/consts.hpp b/src/nostalgia/core/studio/consts.hpp
deleted file mode 100644
index a5c3f190..00000000
--- a/src/nostalgia/core/studio/consts.hpp
+++ /dev/null
@@ -1,13 +0,0 @@
-/*
- * Copyright 2016 - 2022 Gary Talent (gary@drinkingtea.net). All rights reserved.
- */
-
-#pragma once
-
-namespace nostalgia::core {
-
-constexpr auto ModuleName = "NostalgiaCore";
-constexpr auto TileSheetDir = "/TileSheets/";
-constexpr auto PaletteDir = "/Palettes/";
-
-}
diff --git a/src/nostalgia/core/studio/module.cpp b/src/nostalgia/core/studio/module.cpp
index 044cc507..e7f2e0b4 100644
--- a/src/nostalgia/core/studio/module.cpp
+++ b/src/nostalgia/core/studio/module.cpp
@@ -14,7 +14,7 @@ namespace nostalgia::core {
 ox::Vector<studio::EditorMaker> StudioModule::editors(core::Context *ctx) noexcept {
 	return {
 		{
-			{"ng"},
+			{FileExt_ng},
 			[ctx](ox::CRStringView path) -> ox::Result<studio::BaseEditor*> {
 				try {
 					return ox::make<TileSheetEditorImGui>(ctx, path);
@@ -24,7 +24,7 @@ ox::Vector<studio::EditorMaker> StudioModule::editors(core::Context *ctx) noexce
 			}
 		},
 		{
-			{"npal"},
+			{FileExt_npal},
 			[ctx](ox::CRStringView path) -> ox::Result<studio::BaseEditor*> {
 				return PaletteEditorImGui::make(ctx, path);
 			}
diff --git a/src/nostalgia/core/studio/tilesheeteditor-imgui.cpp b/src/nostalgia/core/studio/tilesheeteditor-imgui.cpp
index 72971ed1..191b12f7 100644
--- a/src/nostalgia/core/studio/tilesheeteditor-imgui.cpp
+++ b/src/nostalgia/core/studio/tilesheeteditor-imgui.cpp
@@ -46,7 +46,7 @@ TileSheetEditorImGui::TileSheetEditorImGui(Context *ctx, ox::CRStringView path):
 	// init palette idx
 	const auto &palPath = model()->palPath();
 	auto sctx = applicationData<studio::StudioContext>(m_ctx);
-	const auto &palList = sctx->project->fileList(core::FileExt_npal + 1);
+	const auto &palList = sctx->project->fileList(core::FileExt_npal);
 	for (std::size_t i = 0; const auto &pal : palList) {
 		if (palPath == pal) {
 			m_selectedPaletteIdx = i;
@@ -278,10 +278,9 @@ void TileSheetEditorImGui::drawTileSheet(const geo::Vec2 &fbSize) noexcept {
 	const auto winPos = ImGui::GetWindowPos();
 	const auto fbSizei = geo::Size(static_cast<int>(fbSize.x), static_cast<int>(fbSize.y));
 	if (m_framebuffer.width != fbSizei.width || m_framebuffer.height != fbSizei.height) {
-		m_framebuffer = glutils::generateFrameBuffer(fbSizei.width, fbSizei.height);
+		glutils::resizeInitFrameBuffer(&m_framebuffer, fbSizei.width, fbSizei.height);
 		m_tileSheetEditor.resizeView(fbSize);
 	} else if (m_tileSheetEditor.updated()) {
-		m_tileSheetEditor.resizeView(fbSize);
 		m_tileSheetEditor.ackUpdate();
 	}
 	glBindFramebuffer(GL_FRAMEBUFFER, m_framebuffer);
@@ -344,7 +343,7 @@ void TileSheetEditorImGui::drawTileSheet(const geo::Vec2 &fbSize) noexcept {
 
 void TileSheetEditorImGui::drawPaletteSelector() noexcept {
 	auto sctx = applicationData<studio::StudioContext>(m_ctx);
-	const auto &files = sctx->project->fileList(core::FileExt_npal + 1);
+	const auto &files = sctx->project->fileList(core::FileExt_npal);
 	const auto first = m_selectedPaletteIdx < files.size() ?
 		files[m_selectedPaletteIdx].c_str() : "";
 	if (ImGui::BeginCombo("Palette", first, 0)) {
diff --git a/src/nostalgia/core/studio/tilesheeteditorview.cpp b/src/nostalgia/core/studio/tilesheeteditorview.cpp
index 4b301197..e22ad785 100644
--- a/src/nostalgia/core/studio/tilesheeteditorview.cpp
+++ b/src/nostalgia/core/studio/tilesheeteditorview.cpp
@@ -76,7 +76,7 @@ void TileSheetEditorView::clickSelect(const geo::Vec2 &paneSize, const geo::Vec2
 
 void TileSheetEditorView::clickFill(const geo::Vec2 &paneSize, const geo::Vec2 &clickPos) noexcept {
 	const auto pt = clickPoint(paneSize, clickPos);
-	m_model.fill(pt, m_palIdx);
+	m_model.fill(pt, static_cast<int>(m_palIdx));
 }
 
 void TileSheetEditorView::releaseMouseButton() noexcept {
@@ -100,6 +100,7 @@ ox::Error TileSheetEditorView::markUpdated() noexcept {
 
 void TileSheetEditorView::ackUpdate() noexcept {
 	m_updated = false;
+	m_pixelsDrawer.update(m_viewSize);
 	m_model.ackUpdate();
 }
 
@@ -122,7 +123,7 @@ geo::Point TileSheetEditorView::clickPoint(const geo::Vec2 &paneSize, const geo:
 
 ox::Error TileSheetEditorView::setActiveSubsheet(const TileSheet::SubSheetIdx&) noexcept {
 	initView();
-	return OxError(0);
+	return {};
 }
 
 }
diff --git a/src/nostalgia/core/studio/tilesheetpixelgrid.cpp b/src/nostalgia/core/studio/tilesheetpixelgrid.cpp
index 10b05999..a67a5fa1 100644
--- a/src/nostalgia/core/studio/tilesheetpixelgrid.cpp
+++ b/src/nostalgia/core/studio/tilesheetpixelgrid.cpp
@@ -28,6 +28,8 @@ void TileSheetGrid::draw(bool update, const geo::Vec2 &scroll) noexcept {
 	const auto uniformScroll = glGetUniformLocation(m_shader, "gScroll");
 	glUniform2f(uniformScroll, scroll.x, scroll.y);
 	glDrawArrays(GL_POINTS, 0, static_cast<GLsizei>(m_bufferSet.vertices.size() / VertexVboRowLength));
+	glBindVertexArray(0);
+	glUseProgram(0);
 }
 
 void TileSheetGrid::initBufferSet(const geo::Vec2 &paneSize, const TileSheet::SubSheet &subsheet) noexcept {
diff --git a/src/nostalgia/core/studio/tilesheetpixels.cpp b/src/nostalgia/core/studio/tilesheetpixels.cpp
index f6d759b5..3ad0e6cf 100644
--- a/src/nostalgia/core/studio/tilesheetpixels.cpp
+++ b/src/nostalgia/core/studio/tilesheetpixels.cpp
@@ -31,18 +31,15 @@ void TileSheetPixels::draw(bool update, const geo::Vec2 &scroll) noexcept {
 	const auto uniformScroll = glGetUniformLocation(m_shader, "vScroll");
 	glUniform2f(uniformScroll, scroll.x, scroll.y);
 	glDrawElements(GL_TRIANGLES, static_cast<GLsizei>(m_bufferSet.elements.size()), GL_UNSIGNED_INT, nullptr);
+	glBindVertexArray(0);
+	glUseProgram(0);
 }
 
-void TileSheetPixels::initBufferSet(const geo::Vec2 &paneSize) noexcept {
-	// vao
+void TileSheetPixels::initBufferSet(geo::Vec2 const&paneSize) noexcept {
 	m_bufferSet.vao = glutils::generateVertexArrayObject();
-	glBindVertexArray(m_bufferSet.vao);
-	// vbo & ebo
 	m_bufferSet.vbo = glutils::generateBuffer();
 	m_bufferSet.ebo = glutils::generateBuffer();
-	setBufferObjects(paneSize);
-	glutils::sendVbo(m_bufferSet);
-	glutils::sendEbo(m_bufferSet);
+	update(paneSize);
 	// vbo layout
 	const auto posAttr = static_cast<GLuint>(glGetAttribLocation(m_shader, "vPosition"));
 	glEnableVertexAttribArray(posAttr);
@@ -53,6 +50,13 @@ void TileSheetPixels::initBufferSet(const geo::Vec2 &paneSize) noexcept {
 	                      reinterpret_cast<void*>(2 * sizeof(float)));
 }
 
+void TileSheetPixels::update(geo::Vec2 const&paneSize) noexcept {
+	glBindVertexArray(m_bufferSet.vao);
+	setBufferObjects(paneSize);
+	glutils::sendVbo(m_bufferSet);
+	glutils::sendEbo(m_bufferSet);
+}
+
 geo::Vec2 TileSheetPixels::pixelSize(const geo::Vec2 &paneSize) const noexcept {
 	const auto [sw, sh] = paneSize;
 	constexpr float ymod = 0.35f / 10.0f;
@@ -60,7 +64,13 @@ geo::Vec2 TileSheetPixels::pixelSize(const geo::Vec2 &paneSize) const noexcept {
 	return {xmod * m_pixelSizeMod, ymod * m_pixelSizeMod};
 }
 
-void TileSheetPixels::setPixelBufferObject(const geo::Vec2 &paneSize, unsigned vertexRow, float x, float y, Color16 color, float *vbo, GLuint *ebo) const noexcept {
+void TileSheetPixels::setPixelBufferObject(
+		geo::Vec2 const&paneSize,
+		unsigned vertexRow,
+		float x, float y,
+		Color16 color,
+		float *vbo,
+		GLuint *ebo) const noexcept {
 	const auto [xmod, ymod] = pixelSize(paneSize);
 	x *= xmod;
 	y *= -ymod;
@@ -68,18 +78,18 @@ void TileSheetPixels::setPixelBufferObject(const geo::Vec2 &paneSize, unsigned v
 	y += 1.0f - ymod;
 	const auto r = redf(color), g = greenf(color), b = bluef(color);
 	// don't worry, these memcpys gets optimized to something much more ideal
-	const float vertices[VertexVboLength] = {
+	const ox::Array<float, VertexVboLength> 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, sizeof(vertices));
-	const GLuint elms[VertexEboLength] = {
+	memcpy(vbo, vertices.data(), sizeof(vertices));
+	const ox::Array<GLuint, VertexEboLength> elms = {
 			vertexRow + 0, vertexRow + 1, vertexRow + 2,
 			vertexRow + 2, vertexRow + 3, vertexRow + 0,
 	};
-	memcpy(ebo, elms, sizeof(elms));
+	memcpy(ebo, elms.data(), sizeof(elms));
 }
 
 void TileSheetPixels::setBufferObjects(const geo::Vec2 &paneSize) noexcept {
diff --git a/src/nostalgia/core/studio/tilesheetpixels.hpp b/src/nostalgia/core/studio/tilesheetpixels.hpp
index 738c9eb9..d09ceea5 100644
--- a/src/nostalgia/core/studio/tilesheetpixels.hpp
+++ b/src/nostalgia/core/studio/tilesheetpixels.hpp
@@ -51,7 +51,9 @@ class TileSheetPixels {
 
 		void draw(bool update, const geo::Vec2 &scroll) noexcept;
 
-		void initBufferSet(const geo::Vec2 &paneSize) noexcept;
+		void initBufferSet(geo::Vec2 const&paneSize) noexcept;
+
+		void update(geo::Vec2 const&paneSize) noexcept;
 
 		[[nodiscard]]
 		geo::Vec2 pixelSize(const geo::Vec2 &paneSize) const noexcept;