diff --git a/PanoPainter.vcxproj b/PanoPainter.vcxproj
index 077ce91..8fd034d 100644
--- a/PanoPainter.vcxproj
+++ b/PanoPainter.vcxproj
@@ -542,6 +542,8 @@
     <None Include="data\shaders\texture-alpha-sep.glsl" />
     <None Include="data\shaders\texture-alpha.glsl" />
     <None Include="data\shaders\texture-blend.glsl" />
+    <None Include="data\shaders\texture-colorize.glsl" />
+    <None Include="data\shaders\texture-mask.glsl" />
     <None Include="data\shaders\texture.glsl" />
     <None Include="data\shaders\uvs.glsl" />
     <None Include="data\shaders\vertex-color.glsl" />
diff --git a/PanoPainter.vcxproj.filters b/PanoPainter.vcxproj.filters
index df16511..0ec929c 100644
--- a/PanoPainter.vcxproj.filters
+++ b/PanoPainter.vcxproj.filters
@@ -685,6 +685,12 @@
     <None Include="data\shaders\color-tri.glsl">
       <Filter>shaders</Filter>
     </None>
+    <None Include="data\shaders\texture-colorize.glsl">
+      <Filter>shaders</Filter>
+    </None>
+    <None Include="data\shaders\texture-mask.glsl">
+      <Filter>shaders</Filter>
+    </None>
   </ItemGroup>
   <ItemGroup>
     <Image Include="icon.ico">
diff --git a/data/shaders/texture-colorize.glsl b/data/shaders/texture-colorize.glsl
index 805c1cf..f90da22 100644
--- a/data/shaders/texture-colorize.glsl
+++ b/data/shaders/texture-colorize.glsl
@@ -15,7 +15,7 @@ void main()
 [[fragment]]
 
 uniform sampler2D tex;
-uniform vec4 col;
+uniform mediump vec4 col;
 
 in mediump vec2 uv;
 out mediump vec4 frag;
diff --git a/src/main.cpp b/src/main.cpp
index e314b2b..ab3b107 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -757,7 +757,7 @@ int main(int argc, char** argv)
     pfd.dwFlags = PFD_DRAW_TO_WINDOW | PFD_SUPPORT_OPENGL | PFD_DOUBLEBUFFER;
     pfd.iPixelType = PFD_TYPE_RGBA;
     pfd.cColorBits = 32;
-    pfd.cDepthBits = 16;
+    pfd.cDepthBits = 24;
     pfd.iLayerType = PFD_MAIN_PLANE;
 
     hDC = GetDC(hWnd);
diff --git a/src/node_panel_grid.cpp b/src/node_panel_grid.cpp
index 68f52ac..25c9e5b 100644
--- a/src/node_panel_grid.cpp
+++ b/src/node_panel_grid.cpp
@@ -218,6 +218,7 @@ void NodePanelGrid::draw_heightmap(const glm::mat4& proj, const glm::mat4& camer
 {
     if (m_groud_opacity->get_value() > 0.f)
     {
+        bool depth = glIsEnabled(GL_DEPTH_TEST);
         glEnable(GL_DEPTH_TEST);
         glClear(GL_DEPTH_BUFFER_BIT);
 
@@ -313,6 +314,7 @@ void NodePanelGrid::draw_heightmap(const glm::mat4& proj, const glm::mat4& camer
                 m_plane.draw_fill();
             }
         }
+        depth ? glEnable(GL_DEPTH_TEST) : glDisable(GL_DEPTH_TEST);
     }
 }
 
diff --git a/src/rtt.cpp b/src/rtt.cpp
index 9f4a8aa..e359f48 100644
--- a/src/rtt.cpp
+++ b/src/rtt.cpp
@@ -137,7 +137,7 @@ bool RTT::create(int width, int height, int tex/* = -1*/, GLint internal_format,
     {
         glGenRenderbuffers(1, &rboID);
         glBindRenderbuffer(GL_RENDERBUFFER, rboID);
-        glRenderbufferStorage(GL_RENDERBUFFER, GL_DEPTH_COMPONENT, width, height);
+        glRenderbufferStorage(GL_RENDERBUFFER, GL_DEPTH_COMPONENT24, width, height);
         glBindRenderbuffer(GL_RENDERBUFFER, 0);
     }
 
@@ -151,9 +151,11 @@ bool RTT::create(int width, int height, int tex/* = -1*/, GLint internal_format,
 
     // Attach the texture to FBO color attachment point
     glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, texID, 0);
-
-    // Attach the renderbuffer to depth attachment point
-    //glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, GL_RENDERBUFFER, rboID);
+    if (depth_buffer)
+    {
+        // Attach the renderbuffer to depth attachment point
+        glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, GL_RENDERBUFFER, rboID);
+    }
 
     auto err2str = [](GLenum err) {
         switch (err)