diff --git a/res/shader/Random.glsl b/res/shader/Random.glsl
new file mode 100644
index 00000000..65a1b5bb
--- /dev/null
+++ b/res/shader/Random.glsl
@@ -0,0 +1,4 @@
+vec3 random(vec2 uv)        // from Godot 3.2
+{
+    return vec3(fract(sin(dot(uv,vec2(12.9898,78.233)))*43758.5453123));
+}