SuperTuxKart 1.5 upstream source (from official release tarball)

data/shaders/sky.vert

@@ -0,0 +1,10 @@
+#ifdef Explicit_Attrib_Location_Usable
+layout(location = 0) in vec3 Position;
+#else
+in vec3 Position;
+#endif
+
+void main()
+{
+    gl_Position = vec4(Position, 1.);
+}