diff --git a/Snake.config.json b/Snake.config.json
index 843a5367fc3b51b5d7c52223b5f45c17b577d6ee..e80de9e109e79ce8de9dee727846e6f69ef2eb9f 100644
--- a/Snake.config.json
+++ b/Snake.config.json
@@ -22,6 +22,7 @@
     "bp_density"    : {
         "few"       : 0.1,
         "medium"    : 0.25,
+        "more"      : 0.33,
         "many"      : 0.5
     },
 
diff --git a/Snakefile b/Snakefile
index 96ac5055917b619eb5cea30fb77595412be9076c..02cfa41bb40127c6bf87488e725436bcab155299 100644
--- a/Snakefile
+++ b/Snakefile
@@ -270,6 +270,8 @@ rule segmentation:
     shell:
         """
         {params.mc_command} segment \
+        -m 0.33 \
+        -M 50000000 \
         -o {output} \
         {input} > {log} 2>&1
         """
diff --git a/utils/chrom.R b/utils/chrom.R
index bb4c8f5e9533c48b5068db509c49a01ce562efba..25d095c0bff4de205af948bf30c25e6a8bb70422 100644
--- a/utils/chrom.R
+++ b/utils/chrom.R
@@ -42,7 +42,7 @@ manual_colors = c(
   simul_false_del = "darkgrey",
   simul_inv_dup   = "darkgoldenrod2",
   idup_h1         = muted("darkgoldenrod2", 80, 70),
-  idup_h2         = muted("darkgoldenrod2", 80, 70),
+  idup_h2         = muted("gold", 80, 70),
   complex         = "darkorchid1",
     # background
   bg1 = "#ffffff",