diff --git a/leenkx/blender/lnx/material/make_particle.py b/leenkx/blender/lnx/material/make_particle.py
index 8001dbf..f24a1ea 100644
--- a/leenkx/blender/lnx/material/make_particle.py
+++ b/leenkx/blender/lnx/material/make_particle.py
@@ -55,6 +55,7 @@ def write(vert, particle_info=None, shadowmap=False):
 
     # Outs
     out_index = True if particle_info != None and particle_info['index'] else False
+    out_random = True if particle_info != None and particle_info['random'] else False
     out_age = True if particle_info != None and particle_info['age'] else False
     out_lifetime = True if particle_info != None and particle_info['lifetime'] else False
     out_location = True if particle_info != None and particle_info['location'] else False
@@ -258,6 +259,11 @@ def write(vert, particle_info=None, shadowmap=False):
         vert.add_out('float p_index')
         vert.write('p_index = gl_InstanceID;')
 
+    if out_random:
+        vert.add_out('float p_random')
+        vert.write('p_random = fract(sin(gl_InstanceID) * 43758.5453);')
+
+
 def write_tilesheet(vert):
     # tilesx, tilesy, framerate - pd[3][0], pd[3][1], pd[3][2]
     vert.write('int frame = int((p_age) / pd[3][2]);')