diff --git a/shader/HexGrid.frag b/shader/HexGrid.frag
new file mode 100644
index 0000000..c528567
--- /dev/null
+++ b/shader/HexGrid.frag
@@ -0,0 +1,57 @@
+#version 450 core
+
+layout(location=0) out vec4 FragColor;
+
+layout(binding=1) uniform ColorMaterial
+{
+    vec4 color;
+} color_material;
+
+layout(binding=10) uniform WorldMatrix     // hgl/math/Math.h
+{
+    mat4 ortho;
+
+    mat4 projection;
+    mat4 inverse_projection;
+
+    mat4 modelview;
+    mat4 inverse_modelview;
+
+    mat4 mvp;
+    mat4 inverse_mvp;
+
+    vec4 view_pos;
+    vec2 canvas_resolution;
+    vec2 viewport_resolution;
+}fs_world;
+
+float Hex( vec2 p, vec2 h )
+{
+	vec2 q = abs(p);
+    return max(q.x-h.y,max(q.x+q.y*0.57735,q.y*1.1547)-h.x);
+}
+
+float HexGrid(vec2 p)
+{
+    float scale = 1.2;
+    vec2 grid = vec2(0.692, 0.4) * scale;
+    float radius = 0.22 * scale;
+
+    vec2 p1 = mod(p.xy, grid) - grid*0.5;
+    float c1 = Hex(p1, vec2(radius, radius));
+
+    vec2 p2 = mod(p.xy+grid*0.5, grid) - grid*0.5;
+    float c2 = Hex(p2, vec2(radius, radius));
+    return min(c1, c2);
+}
+
+void main()
+{
+    vec2 uv=(gl_FragCoord.xy-fs_world.canvas_resolution.xy/2.0)/80.0;
+
+    float lum=HexGrid(uv);
+
+    lum=lum > 0.0 ? 1.0 : 0.0;
+
+    FragColor=vec4(color_material.color.rgb*lum,1.0);
+}