diff --git a/src/ViewCube.cpp b/src/ViewCube.cpp
index 0441602..1fb88b1 100644
--- a/src/ViewCube.cpp
+++ b/src/ViewCube.cpp
@@ -34,17 +34,31 @@ void ViewCube::initializeGL()
     setupBuffers();
 }
 
-void ViewCube::paintGL(QOpenGLShaderProgram* simpleShader, int simpleShaderColorLoc, const QMatrix4x4& viewMatrix, int width, int height)
+void ViewCube::paintGL(QOpenGLShaderProgram* simpleShader, int simpleShaderColorLoc, const QMatrix4x4& viewMatrix, int width, int height, const QPoint& mousePos)
 {
     int viewCubeSize = 150 * QGuiApplication::primaryScreen()->devicePixelRatio();
     glViewport(width - viewCubeSize, height - viewCubeSize, viewCubeSize, viewCubeSize);
+
+    QRect viewCubeRect(width - viewCubeSize, 0, viewCubeSize, viewCubeSize);
+    QPoint physicalMousePos = mousePos * QGuiApplication::primaryScreen()->devicePixelRatio();
+
+    float opacity = 0.25f;
+    if (viewCubeRect.contains(physicalMousePos)) {
+        opacity = 1.0f;
+    }
+
+    glEnable(GL_BLEND);
+    glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
+
     glClear(GL_DEPTH_BUFFER_BIT);
 
     QMatrix4x4 viewCubeProjection;
     viewCubeProjection.ortho(-2, 2, -2, 2, -10, 10);
 
-    drawViewCube(viewCubeProjection, viewMatrix);
+    drawViewCube(viewCubeProjection, viewMatrix, opacity);
     drawAxes(simpleShader, simpleShaderColorLoc, viewCubeProjection, viewMatrix);
+
+    glDisable(GL_BLEND);
 }
 
 void ViewCube::createFaceTextures()
@@ -146,7 +160,7 @@ void ViewCube::setupBuffers()
     m_axesVbo.release();
 }
 
-void ViewCube::drawViewCube(const QMatrix4x4& projection, const QMatrix4x4& view)
+void ViewCube::drawViewCube(const QMatrix4x4& projection, const QMatrix4x4& view, float opacity)
 {
     if (!m_textureShaderProgram || !m_textureShaderProgram->isLinked()) return;
 
@@ -155,6 +169,7 @@ void ViewCube::drawViewCube(const QMatrix4x4& projection, const QMatrix4x4& view
     m_textureShaderProgram->setUniformValue("projectionMatrix", projection);
     m_textureShaderProgram->setUniformValue("modelViewMatrix", view);
     m_textureShaderProgram->setUniformValue("texture_diffuse1", 0);
+    m_textureShaderProgram->setUniformValue("opacity", opacity);
 
     QOpenGLVertexArrayObject::Binder vaoBinder(&m_cubeVao);
     for (int i = 0; i < 6; ++i) {
diff --git a/src/ViewCube.h b/src/ViewCube.h
index c003cd1..f635ae8 100644
--- a/src/ViewCube.h
+++ b/src/ViewCube.h
@@ -5,6 +5,7 @@
 #include <QMatrix4x4>
 #include <QOpenGLVertexArrayObject>
 #include <QOpenGLBuffer>
+#include <QPoint>
 
 class QOpenGLShaderProgram;
 class QOpenGLTexture;
@@ -16,13 +17,13 @@ public:
     ~ViewCube();
 
     void initializeGL();
-    void paintGL(QOpenGLShaderProgram* simpleShader, int simpleShaderColorLoc, const QMatrix4x4& viewMatrix, int width, int height);
+    void paintGL(QOpenGLShaderProgram* simpleShader, int simpleShaderColorLoc, const QMatrix4x4& viewMatrix, int width, int height, const QPoint& mousePos);
 
 private:
     void createFaceTextures();
     void initShaders();
     void setupBuffers();
-    void drawViewCube(const QMatrix4x4& projection, const QMatrix4x4& view);
+    void drawViewCube(const QMatrix4x4& projection, const QMatrix4x4& view, float opacity);
     void drawAxes(QOpenGLShaderProgram* simpleShader, int colorLoc, const QMatrix4x4& projection, const QMatrix4x4& view);
 
     QOpenGLTexture* m_faceTextures[6];
diff --git a/src/ViewportWidget.cpp b/src/ViewportWidget.cpp
index 2a9d0c9..e42af83 100644
--- a/src/ViewportWidget.cpp
+++ b/src/ViewportWidget.cpp
@@ -191,7 +191,7 @@ void ViewportWidget::paintGL()
     QMatrix4x4 viewCubeModel;
     viewCubeModel.rotate(m_camera->xRotation() / 16.0f, 1, 0, 0);
     viewCubeModel.rotate(m_camera->yRotation() / 16.0f, 0, 1, 0);
-    m_viewCube->paintGL(m_shaderProgram, m_colorLoc, viewCubeModel, width() * retinaScale, height() * retinaScale);
+    m_viewCube->paintGL(m_shaderProgram, m_colorLoc, viewCubeModel, width() * retinaScale, height() * retinaScale, m_currentMousePos);
 
     glViewport(0, 0, width() * retinaScale, height() * retinaScale);
     glDisable(GL_DEPTH_TEST);
diff --git a/src/shaders/texture.frag b/src/shaders/texture.frag
index d8ef8cd..82bacbc 100644
--- a/src/shaders/texture.frag
+++ b/src/shaders/texture.frag
@@ -5,8 +5,10 @@ out vec4 FragColor;
 in vec2 TexCoord;
 
 uniform sampler2D texture_diffuse1;
+uniform float opacity;
 
 void main()
 {
-    FragColor = texture(texture_diffuse1, TexCoord);
+    vec4 texColor = texture(texture_diffuse1, TexCoord);
+    FragColor = vec4(texColor.rgb, texColor.a * opacity);
 }