diff -r a36913fc552a -r f21b800b02a4 src/ui/canvas.cpp
--- a/src/ui/canvas.cpp	Fri Mar 06 16:08:53 2020 +0200
+++ b/src/ui/canvas.cpp	Fri Mar 06 20:13:10 2020 +0200
@@ -7,8 +7,7 @@
 	DocumentManager* documents,
 	const ldraw::ColorTable& colorTable,
 	QWidget* parent) :
-	PartRenderer{model, documents, colorTable, parent},
-	gridProgram{this}
+	PartRenderer{model, documents, colorTable, parent}
 {
 	this->setMouseTracking(true);
 }
@@ -70,12 +69,12 @@
 		if (angle_x < angle_y)
 		{
 			this->newStatusText("rotate by X axis");
-			this->gridMatrix = glm::rotate(this->gridMatrix, float{M_PI} / 2, glm::vec3{1, 0, 0});
+			this->gridMatrix = glm::rotate(this->gridMatrix, PIf / 2, glm::vec3{1, 0, 0});
 		}
 		else
 		{
 			this->newStatusText("rotate by Y axis");
-			this->gridMatrix = glm::rotate(this->gridMatrix, float{M_PI} / 2, glm::vec3{0, 1, 0});
+			this->gridMatrix = glm::rotate(this->gridMatrix, PIf / 2, glm::vec3{0, 1, 0});
 		}
 		this->updateGridMatrix();
 		this->update();
@@ -119,18 +118,20 @@
 	// functions so that when initialization sets up, the signals also set up the matrices on our side.
 	this->gridProgram.emplace(this);
 	this->gridProgram->initialize();
-	connect(this, &PartRenderer::projectionMatrixChanged, [&]()
-	{
-		this->gridProgram->setProjectionMatrix(this->projectionMatrix);
-	});
-	connect(this, &PartRenderer::modelMatrixChanged, [&]()
+	this->axesProgram.emplace(this);
+	this->axesProgram->initialize();
+	for (AbstractBasicShaderProgram* program : {
+		static_cast<AbstractBasicShaderProgram*>(&*this->gridProgram),
+		static_cast<AbstractBasicShaderProgram*>(&*this->axesProgram),
+	})
 	{
-		this->gridProgram->setModelMatrix(this->modelMatrix);
-	});
-	connect(this, &PartRenderer::viewMatrixChanged, [&]()
-	{
-		this->gridProgram->setViewMatrix(this->viewMatrix);
-	});
+		connect(this, &PartRenderer::projectionMatrixChanged,
+			program, &AbstractBasicShaderProgram::setProjectionMatrix);
+		connect(this, &PartRenderer::modelMatrixChanged,
+			program, &AbstractBasicShaderProgram::setModelMatrix);
+		connect(this, &PartRenderer::viewMatrixChanged,
+			program, &AbstractBasicShaderProgram::setViewMatrix);
+	}
 	connect(this, &PartRenderer::renderPreferencesChanged, [&]()
 	{
 		if (this->gridProgram.has_value())
@@ -140,14 +141,7 @@
 		}
 	});
 	PartRenderer::initializeGL();
-	/*
-	this->gridMatrix = glm::mat4{
-		{-4, 0, 0, 0},
-		{0, 6.9266, -3.6955, 0},
-		{0, -16.7222, -1.5307, 0},
-		{0, -13.273, -9.255, 1},
-	};
-	*/
+	// Set up XZ grid matrix
 	this->gridMatrix = glm::mat4{
 		{1, 0, 0, 0},
 		{0, 0, 1, 0},
@@ -160,10 +154,21 @@
 void Canvas::paintGL()
 {
 	PartRenderer::paintGL();
-	glEnable(GL_BLEND);
-	glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
-	this->gridProgram->draw();
-	glDisable(GL_BLEND);
+	// Render axes
+	{
+		glLineWidth(5);
+		glEnable(GL_LINE_SMOOTH);
+		glHint(GL_LINE_SMOOTH_HINT, GL_NICEST);
+		this->axesProgram->draw();
+		glDisable(GL_LINE_SMOOTH);
+	}
+	// Render grid
+	{
+		glEnable(GL_BLEND);
+		glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
+		this->gridProgram->draw();
+		glDisable(GL_BLEND);
+	}
 	if (this->worldPosition.has_value())
 	{
 		QPainter painter{this};
@@ -175,22 +180,6 @@
 		painter.setPen(Qt::white);
 		painter.drawText(pos + QPointF{5, 5}, vectorToString(*this->worldPosition));
 	}
-	{
-		QPainter axisPainter{this};
-		axisPainter.setRenderHint(QPainter::Antialiasing);
-		axisPainter.setPen(Qt::red);
-		axisPainter.drawLine(
-			this->modelToScreenCoordinates({10, 0, 0}),
-			this->modelToScreenCoordinates({-10, 0, 0}));
-		axisPainter.setPen(Qt::green);
-		axisPainter.drawLine(
-			this->modelToScreenCoordinates({0, 10, 0}),
-			this->modelToScreenCoordinates({0, -10, 0}));
-		axisPainter.setPen(Qt::blue);
-		axisPainter.drawLine(
-			this->modelToScreenCoordinates({0, 0, 10}),
-			this->modelToScreenCoordinates({0, 0, -10}));
-	}
 }
 
 void Canvas::updateGridMatrix()