diff --git a/demo.py b/demo.py
index c72d0a8..d688dde 100644
--- a/demo.py
+++ b/demo.py
@@ -50,9 +50,10 @@
 # Generate correlation matrix for tilt. Do this once for each different turbulence parameter. 
 tilt_mat(im_size, D, r0, L)
 
-# Simulate
+# Simulate. 
 simulator = Simulator(D/r0, im_size).to(device, dtype=torch.float32)
 
+#Note that the current version does not support batched images. Only one frame at a time. 
 out = simulator(x).detach().cpu().numpy()
 
 if len(out.shape) == 3: