diff --git a/.gitmodules b/.gitmodules
index 689e3e1..b900224 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -40,3 +40,6 @@
 [submodule "Spielfeld"]
 	path = Spielfeld
 	url = http://git.blubbfish.net/BlubbFish/Spielfeld.git
+[submodule "SmallptGPU-v1.6"]
+	path = SmallptGPU-v1.6
+	url = http://git.blubbfish.net/BlubbFish/SmallptGPU-v1.6.git
diff --git a/SmallptGPU-v1.6 b/SmallptGPU-v1.6
new file mode 160000
index 0000000..c4270d4
--- /dev/null
+++ b/SmallptGPU-v1.6
@@ -0,0 +1 @@
+Subproject commit c4270d4a2e44558a6718ee2bb2cc5b8f0dc05809