diff --git a/py/posterize.py b/py/posterize.py
index 077bc51..dbcfddd 100644
--- a/py/posterize.py
+++ b/py/posterize.py
@@ -63,6 +63,7 @@ class Posterize:
 		self.determine_colors()
 		self.stipple()
 		self.preview()
+		self.optimize()
 
 	def posterize (self):
 		lab = cv2.cvtColor(self.image, cv2.COLOR_BGR2LAB)
@@ -185,21 +186,29 @@ class Posterize:
 				'output_svg' : output_svg
 			})
 
-		if self.jobs > 1 :
-			print(f'Running {self.jobs} processes simultaneously for {len(cmds)} jobs')
+		if self.jobs > 1 and len(cmds) > 1:
+			print(f'Running {self.jobs} stipple_gen processes simultaneously for {len(cmds)} jobs')
+			results = []
 			pool = ThreadPool(self.jobs)
 			for job in cmds :
-				pool.apply_async(self.render, (job,))
-			pool.close()
-			pool.join()
-
+				result = pool.apply_async(self.render, (job,))
+				results.append(result)
+			[result.wait() for result in results]
 		else :
 			for job in cmds :
 				self.render(job)
 
 
 	def render (self, job) : 
-		subprocess.Popen(job['cmd'], cwd = self.stipple_gen)
+		name = os.path.basename(job['output_svg'])
+		print(f'Starting stipple_gen {name}...')
+		proc = subprocess.Popen(job['cmd'], cwd = self.stipple_gen, stdout=subprocess.PIPE)
+		while True:
+			line = proc.stdout.readline()
+			if not line:
+				break
+			l = line.decode('ascii').strip()
+			print(f'[{name}] {l}')
 		self.svgs.append(job['output_svg'])
 		self.previews.append({
 			'layer' : job['output_image'],
@@ -220,11 +229,31 @@ class Posterize:
 
 		self.show(composite)
 
-		for svg in self.svgs :
-			cmd = [ 'svgopt', svg, svg]
-			print(cmd)
-			subprocess.call(cmd)
+	def optimize (self) :
+		if self.jobs > 1 and len(self.svgs) > 1:
+			print(f'Running {self.jobs} svgopt processes simultaneously for {len(self.svgs)} jobs')
+			results = []
+			pool = ThreadPool(self.jobs)
+			for svg in self.svgs:
+				result = pool.apply_async(self.svgopt, (svg,))
+				results.append(result)
+			[result.wait() for result in results]
+		else :
+			for svg in self.svgs :
+				self.svgopt(svg)
 
+	def svgopt (self, svg) :
+		name = os.path.basename(svg)
+		cmd = [ 'svgopt', svg, svg]
+		print(f'Optimizing {name}...')
+		proc = subprocess.Popen(cmd, cwd = self.stipple_gen, stdout=subprocess.PIPE)
+		while True:
+			line = proc.stdout.readline()
+			if not line:
+				break
+			l = line.decode('ascii').strip()
+			print(f'[{name}] {l}')
+		
 	def show (self, mat) :
 		if not self.headless :
 			cv2.imshow('image', mat)