diff --git a/nodes/masks/mask_base.py b/nodes/masks/mask_base.py
index 0d27f60..b210f0b 100644
--- a/nodes/masks/mask_base.py
+++ b/nodes/masks/mask_base.py
@@ -555,7 +555,8 @@ class ParticleSystemMaskBase(MaskBase, ABC):
                         'end_frame': end_frame,
                         'effect_duration': effect_duration,
                         'temporal_easing': modulation['temporal_easing'],
-                        'palindrome': modulation['palindrome']
+                        'palindrome': modulation['palindrome'],
+                        'random': modulation.get('random', False)  # Add this line
                     }
                     
                     if modulation['type'] == 'ParticleSizeModulation':
@@ -577,7 +578,10 @@ class ParticleSystemMaskBase(MaskBase, ABC):
 
         for modulation in self.emitter_modulations[emitter_index]:
             if modulation['start_frame'] <= current_frame < modulation['end_frame']:
-                progress = self.calculate_modulation_progress(current_frame, modulation, particle.creation_frame)
+                if modulation.get('random', False):
+                    progress = random.random()  # Generate a random value between 0 and 1
+                else:
+                    progress = self.calculate_modulation_progress(current_frame, modulation, particle.creation_frame)
                 
                 if modulation['type'] == 'ParticleSizeModulation':
                     self.apply_size_modulation(particle, modulation, progress)
diff --git a/nodes/masks/particle_system_masks.py b/nodes/masks/particle_system_masks.py
index 78c4247..019ad8f 100644
--- a/nodes/masks/particle_system_masks.py
+++ b/nodes/masks/particle_system_masks.py
@@ -309,6 +309,7 @@ class ParticleModulationBase(ParticleSystemModulatorBase):
                 "effect_duration": ("INT", {"default": 0, "min": 0, "max": 1000, "step": 1}),
                 "temporal_easing": (["ease_in_out", "linear", "bounce", "elastic", "none"],),
                 "palindrome": ("BOOLEAN", {"default": False}),
+                "random": ("BOOLEAN", {"default": False}),
             },
             "optional": {
                 "previous_modulation": ("PARTICLE_MODULATION",),
@@ -316,13 +317,14 @@ class ParticleModulationBase(ParticleSystemModulatorBase):
         }
     
 
-    def create_modulation(self, start_frame, end_frame, effect_duration, temporal_easing, palindrome, previous_modulation=None):
+    def create_modulation(self, start_frame, end_frame, effect_duration, temporal_easing, palindrome, random, previous_modulation=None):
         modulation = {
             "start_frame": start_frame,
             "end_frame": end_frame,
             "effect_duration": effect_duration,
             "temporal_easing": temporal_easing,
             "palindrome": palindrome,
+            "random": random,
         }
         
         modulation_type = self.__class__.__name__