diff --git a/nodes/flex/flex_externals.py b/nodes/flex/flex_externals.py
index dee1527..8b2bc96 100644
--- a/nodes/flex/flex_externals.py
+++ b/nodes/flex/flex_externals.py
@@ -771,10 +771,23 @@ class FeatureToMask(FlexExternalModulator):
         height = feature.height
         width = feature.width
         
-        # Get all normalized values at once
+        # Get normalized data as numpy array
         normalized_data = feature.get_normalized_data()
+        if normalized_data is None:
+            # If no data available, use frame-by-frame normalization
+            normalized_data = np.array([feature.get_value_at_frame(i) for i in range(feature.frame_count)])
+            if len(normalized_data) > 0:
+                min_val = np.min(normalized_data)
+                max_val = np.max(normalized_data)
+                if max_val > min_val:
+                    normalized_data = (normalized_data - min_val) / (max_val - min_val)
+                else:
+                    normalized_data = np.zeros_like(normalized_data)
+        
+        # Convert to torch tensor and reshape for broadcasting
+        normalized_tensor = torch.from_numpy(normalized_data).float()
         
         # Create masks for all frames at once by expanding the normalized data
-        masks_out = normalized_data.unsqueeze(-1).unsqueeze(-1).expand(-1, height, width)
+        masks_out = normalized_tensor.unsqueeze(-1).unsqueeze(-1).expand(-1, height, width)
         return (masks_out,)
     
diff --git a/nodes/masks/flex_mask_base.py b/nodes/masks/flex_mask_base.py
index 9803853..5493496 100644
--- a/nodes/masks/flex_mask_base.py
+++ b/nodes/masks/flex_mask_base.py
@@ -80,14 +80,23 @@ class FlexMaskBase(FlexBase, MaskBase):
                     mask_strength=1.0, invert=False, subtract_original=0.0, 
                     grow_with_blur=0.0, feature_param=None, feature_mode="relative", **kwargs):
         """Main entry point for the Flex system."""
-        num_frames = masks.shape[0]
+        if opt_feature is not None:
+            num_frames = opt_feature.frame_count
+        else:
+            # Start with number of input frames
+            num_frames = masks.shape[0]
+            # Check all parameters for lists/arrays that might be longer
+            for value in kwargs.values():
+                if isinstance(value, (list, tuple, np.ndarray)):
+                    num_frames = max(num_frames, len(value))
+
         original_masks = masks.clone()
 
         self.start_progress(num_frames, desc=f"Applying {self.__class__.__name__}")
 
         result = []
         for i in range(num_frames):
-            mask = masks[i].numpy()
+            mask = masks[i % masks.shape[0]].numpy()
             
             # Get feature value
             feature_value = self.get_feature_value(i, opt_feature)
@@ -118,11 +127,10 @@ class FlexMaskBase(FlexBase, MaskBase):
                     **processed_kwargs
                 )
 
-
-            # Apply mask operations
+            # Apply mask operations using modulo for original mask indexing
             frame_result = self.apply_mask_operation(
                 processed_mask[np.newaxis, ...],
-                original_masks[i:i+1],
+                original_masks[i % masks.shape[0]:i % masks.shape[0]+1],
                 processed_kwargs['mask_strength'],
                 invert,
                 processed_kwargs['subtract_original'],