diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 0000000..03531a8
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,3 @@
+[submodule "fluid"]
+	path = fluid
+	url = https://github.com/explorable-viz/fluid
diff --git a/fluid b/fluid
new file mode 160000
index 0000000..2de16c6
--- /dev/null
+++ b/fluid
@@ -0,0 +1 @@
+Subproject commit 2de16c632942e7b1f76b6e25442b532d019afeeb