Try ThreadRng

src/main.rs

@@ -29,8 +29,8 @@ struct Cli {
 fn main() {
     let cli = Cli::parse();
 
-    let mut sys = DLASystem::<SmallRng, VectorStorage, LocalRandomWalker>::new(
-        SmallRng::seed_from_u64(cli.seed),
+    let mut sys = DLASystem::<ThreadRng, VectorStorage, LocalRandomWalker>::new(
+        ThreadRng::default(),
         cli.max_particles,
         cli.stick_probability
     );