diff --git a/src/ViewportWidget.cpp b/src/ViewportWidget.cpp
index ecf605c..e3a847d 100644
--- a/src/ViewportWidget.cpp
+++ b/src/ViewportWidget.cpp
@@ -138,11 +138,9 @@ void ViewportWidget::paintGL()
     }
 
     if (m_isSnappingOrigin) {
-        const float rectSize = 0.2f;
-        glColor4f(1.0, 1.0, 0.0, 0.5f);
-        glEnable(GL_BLEND);
-        glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
-        glBegin(GL_QUADS);
+        const float rectSize = 0.0075f * -m_zoom;
+        glColor3f(1.0, 1.0, 0.0);
+        glBegin(GL_LINE_LOOP);
         if (m_currentPlane == SketchPlane::XY) {
             glVertex3f(-rectSize, -rectSize, 0);
             glVertex3f( rectSize, -rectSize, 0);
@@ -160,7 +158,6 @@ void ViewportWidget::paintGL()
             glVertex3f(0, -rectSize,  rectSize);
         }
         glEnd();
-        glDisable(GL_BLEND);
     }
 
     if (m_isDefiningLine && m_activeTool == static_cast<int>(ApplicationController::ToolType::Line)) {
@@ -234,7 +231,7 @@ void ViewportWidget::mouseMoveEvent(QMouseEvent *event)
     bool shouldSnap = false;
     if (m_currentPlane != SketchPlane::NONE) {
         QVector3D worldPos = unproject(m_currentMousePos);
-        const float snapThreshold = 0.5f;
+        const float snapThreshold = 0.025f * -m_zoom;
         shouldSnap = worldPos.length() < snapThreshold;
     }