diff --git a/data/shaders/texture-mask.glsl b/data/shaders/texture-mask.glsl
index 04dbb46..f3e50f2 100644
--- a/data/shaders/texture-mask.glsl
+++ b/data/shaders/texture-mask.glsl
@@ -15,14 +15,13 @@ void main()
 [[fragment]]
 
 uniform sampler2D tex;
+uniform vec2 pattern_offset;
 
 in mediump vec2 uv;
 out mediump vec4 frag;
 
 void main()
 {
-    mediump float stroke = 1.0 - texture(tex, uv).r;
-
     int zero_count = 0;
     if (textureOffset(tex, uv, ivec2(-1, -1)).r > 0.99) zero_count++;
     if (textureOffset(tex, uv, ivec2(-1,  0)).r > 0.99) zero_count++;
@@ -37,7 +36,7 @@ void main()
 
     const mediump vec4 c1 = vec4(1.0, 1.0, 1.0, 1.0);
     const mediump vec4 c2 = vec4(0.9, 0.9, 0.9, 1.0);
-    mediump vec2 c = floor(fract(uv * 50.0) * 2.0);
+    mediump vec2 c = floor(fract((uv + pattern_offset) * 50.0) * 2.0);
     mediump float alpha = mix(c.x, 1.0 - c.x, c.y);
 
     frag = vec4(vec3(edge * alpha), edge);
diff --git a/src/node_canvas.cpp b/src/node_canvas.cpp
index e35dbb5..d88b6b4 100644
--- a/src/node_canvas.cpp
+++ b/src/node_canvas.cpp
@@ -441,15 +441,20 @@ void NodeCanvas::draw()
     }
 
     glDisable(GL_DEPTH_TEST);
+
     if (m_canvas->m_smask_active || m_canvas->m_current_mode == kCanvasMode::Copy || m_canvas->m_current_mode == kCanvasMode::Cut)
     {
-//         if (m_canvas->m_smask_mode == 1)
-//             m_canvas->modes[(int)kCanvasMode::MaskFree][0]->on_Draw(ortho_proj, proj, camera);
-//         else if (m_canvas->m_smask_mode == 2)
-//             m_canvas->modes[(int)kCanvasMode::MaskLine][0]->on_Draw(ortho_proj, proj, camera);
+        if (m_canvas->m_smask_mode == 1)
+            m_canvas->modes[(int)kCanvasMode::MaskFree][0]->on_Draw(ortho_proj, proj, camera);
+        else if (m_canvas->m_smask_mode == 2)
+            m_canvas->modes[(int)kCanvasMode::MaskLine][0]->on_Draw(ortho_proj, proj, camera);
+    }
 
+    if (m_canvas->m_smask_active)
+    {
         ShaderManager::use(kShader::TextureMask);
         ShaderManager::u_int(kShaderUniform::Tex, 0);
+        ShaderManager::u_vec2(kShaderUniform::PatternOffset, m_outline_pan);
         glActiveTexture(GL_TEXTURE0);
         glEnable(GL_BLEND);
 
@@ -644,6 +649,11 @@ void NodeCanvas::reset_camera()
     m_canvas->m_pan = {0, 0};
 }
 
+void NodeCanvas::on_tick(float dt)
+{
+    m_outline_pan = glm::fract(m_outline_pan + dt * 0.01f);
+}
+
 void NodeCanvas::destroy_immediate()
 {
     Node::destroy_immediate();
diff --git a/src/node_canvas.h b/src/node_canvas.h
index b84d869..3639df1 100644
--- a/src/node_canvas.h
+++ b/src/node_canvas.h
@@ -16,6 +16,7 @@ public:
     Plane m_face_plane;
     LineSegment m_line;
     Plane m_grid;
+    glm::vec2 m_outline_pan;
     int m_grid_divs = 30;
     virtual Node* clone_instantiate() const override;
     virtual void init() override;
@@ -25,5 +26,6 @@ public:
     virtual void handle_resize(glm::vec2 old_size, glm::vec2 new_size) override;
     virtual kEventResult handle_event(Event* e) override;
     virtual void destroy_immediate() override;
+    virtual void on_tick(float dt) override;
     void reset_camera();
 };