diff --git a/isorenderer.go b/isorenderer.go
index 3f0307a..a3194e3 100644
--- a/isorenderer.go
+++ b/isorenderer.go
@@ -70,11 +70,7 @@ func RenderIsometric(na types.NodeAccessor, cr types.ColorResolver, from, to *ty
 		}
 	}
 
-	slices.SortFunc(nodes, func(n1, n2 *NodeWithColor) int {
-		o1 := GetIsoNodeOrder(n1.Pos)
-		o2 := GetIsoNodeOrder(n2.Pos)
-		return o1 - o2
-	})
+	slices.SortFunc(nodes, SortNodesWithColor)
 
 	for _, n := range nodes {
 		rel_pos := n.Pos.Subtract(min)
diff --git a/utils.go b/utils.go
index 50d2fb0..239f47b 100644
--- a/utils.go
+++ b/utils.go
@@ -123,3 +123,9 @@ func BlendColor(bg, fg *color.RGBA, bf float64) *color.RGBA {
 		A: max(bg.A, fg.A),
 	}
 }
+
+func SortNodesWithColor(n1, n2 *NodeWithColor) int {
+	o1 := GetIsoNodeOrder(n1.Pos)
+	o2 := GetIsoNodeOrder(n2.Pos)
+	return o1 - o2
+}