diff --git a/shaders/sun_shadow.vert b/shaders/sun_shadow.vert
new file mode 100644
index 0000000..05306dc
--- /dev/null
+++ b/shaders/sun_shadow.vert
@@ -0,0 +1,17 @@
+#version 420 core
+
+layout (location = 0) in vec3 pos;
+
+uniform mat4 model;
+
+layout(std140, binding = 3) uniform Sun
+{
+    vec3 direction;
+    vec3 color;
+    mat4 vp;
+} sun;
+
+void main()
+{
+    gl_Position = sun.vp * model * vec4(pos, 1.0);
+}