diff --git a/testspr/test.sh b/testspr/test.sh
index 4b7d85ed..3d3661f6 100755
--- a/testspr/test.sh
+++ b/testspr/test.sh
@@ -29,7 +29,6 @@ compile() {
 	${5}/${1}-${2}/bin/${1/%cc}++ -Wall -pedantic -std=c++11 -o ${stagedir}/test_${1}${2//.} ${4} ${3}
 	results[${1}-${2}]=$?
 }
-
 execute() {
 	if [ ${results[${1}-${2}]} -eq 0 ]; then
 		echo "${1}-${2} compile succeeded."
@@ -99,14 +98,17 @@ echo "  gcc-version = (${gcc_version})"
 echo "  clang-version = (${clang_version})"
 echo "  gcc-root = '${gcc_root}'"
 echo "  clang-root = '${clang_root}'"
-if [ ${#user_macros[*]} -gt 0 ]; then
-	echo "  user-macros = (${user_macros[*]})"
-fi
-if [ ${#include_paths[*]} -gt 0 ]; then
-	echo "  include-paths = (${include_paths[*]})"
-fi
+echo "  user-macros = (${user_macros[*]})"
+echo "  include-paths = (${include_paths[*]})"
 echo "  force = ${force}"
 
+for user_macro in ${user_macros}; do
+	define_options="${define_options} -D${user_macro}"
+done
+for include_path in ${include_paths}; do
+	include_options="${include_options} -I${include_path}"
+done
+
 if [ -d "${stagedir}" ]; then
 	if [ ${force} -eq 0 ]; then
 		echo >&2 "error: stagedir(${stagedir}) already exists."
@@ -118,18 +120,9 @@ else
 	mkdir -p ${stagedir}
 fi
 
-for user_macro in ${user_macros}; do
-	define_options="${define_options} -D${user_macro}"
-done
-
-for include_path in ${include_paths}; do
-	include_options="${include_options} -I${include_path}"
-done
-
 for version in ${gcc_version}; do
 	compile gcc ${version} $(cd $(dirname $0); pwd)/sprout.cpp "${define_options} ${include_options} ${version_specific_options[gcc-${version}]}" ${gcc_root}
 done
-
 for version in ${clang_version}; do
 	compile clang ${version} $(cd $(dirname $0); pwd)/sprout.cpp "${define_options} ${include_options} ${version_specific_options[clang-${version}]}" ${clang_root}
 done
@@ -137,7 +130,6 @@ done
 for version in ${gcc_version}; do
 	execute gcc ${version}
 done
-
 for version in ${clang_version}; do
 	execute clang ${version}
 done
diff --git a/tools/darkroom/darkcult.py b/tools/darkroom/darkcult.py
index 5948856d..29004fa0 100755
--- a/tools/darkroom/darkcult.py
+++ b/tools/darkroom/darkcult.py
@@ -1,7 +1,13 @@
 #!/usr/bin/env python
-
+# =============================================================================
+# Copyright (c) 2011-2013 Bolero MURAKAMI
+# https://github.com/bolero-MURAKAMI/Sprout
+#
+# Distributed under the Boost Software License, Version 1.0. (See accompanying
+# file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+# =============================================================================
 import sys
-import os
+import optparse
 import subprocess
 import multiprocessing
 
@@ -10,45 +16,50 @@ def compile(command):
 	sys.stdout.flush()
 	return subprocess.call(command, shell=True, stdin=subprocess.PIPE, stdout=subprocess.PIPE)
 
-if __name__=="__main__":
-	argv = sys.argv
-	argc = len(argv)
+def main():
+	parser = optparse.OptionParser(description='darkcult.py')
+	parser.add_option('--src', type='string')
+	parser.add_option('--stagedir', type='string')
+	parser.add_option('--output', type='string')
+	parser.add_option('--compiler', type='string')
+	parser.add_option('--width', type='int')
+	parser.add_option('--height', type='int')
+	parser.add_option('--tile_width', type='int')
+	parser.add_option('--tile_height', type='int')
+	parser.add_option('--compile_options', type='string')
+	parser.add_option('--darkcult_cpp', type='string')
+	parser.add_option('--max_procs', type='int')
+	(opts, args) = parser.parse_args()
 
-	src = argv[1]
-	stagedir = argv[2]
-	output = argv[3]
-	compiler = argv[4]
-	width = int(argv[5])
-	height = int(argv[6])
-	tile_width = int(argv[7])
-	tile_height = int(argv[8])
-	compile_options = argv[9]
-	darkcult_cpp = argv[10]
-	max_procs = int(argv[11])
+	pool = multiprocessing.Pool(opts.max_procs if opts.max_procs != 0 else None)
 
-	commands = []
-	for y in range(0, height, tile_height):
-		for x in range(0, width, tile_width):
-			bin = "%s/%d/%d.out" % (stagedir, y, x)
-			out = "%s/%d/%d.ppm" % (stagedir, y, x)
-			command = "%s -o %s" \
-				" %s" \
-				" -DDARKROOM_SOURCE=\'\"%s\"\'" \
-				" -DDARKROOM_TOTAL_WIDTH=%d -DDARKROOM_TOTAL_HEIGHT=%d" \
-				" -DDARKROOM_TILE_WIDTH=%d -DDARKROOM_TILE_HEIGHT=%d" \
-				" -DDARKROOM_OFFSET_X=%d -DDARKROOM_OFFSET_Y=%d" \
-				" %s" \
-				" && %s > %s" \
-				% (compiler, bin,
-					compile_options,
-					src,
-					width, height,
-					tile_width, tile_height,
-					x, y,
-					darkcult_cpp,
-					bin, out
+	def format_command(x, y):
+		bin = "%s/%d/%d.out" % (opts.stagedir, y, x)
+		out = "%s/%d/%d.ppm" % (opts.stagedir, y, x)
+		return "%s -o %s" \
+			" %s" \
+			" -DDARKROOM_SOURCE=\'\"%s\"\'" \
+			" -DDARKROOM_TOTAL_WIDTH=%d -DDARKROOM_TOTAL_HEIGHT=%d" \
+			" -DDARKROOM_TILE_WIDTH=%d -DDARKROOM_TILE_HEIGHT=%d" \
+			" -DDARKROOM_OFFSET_X=%d -DDARKROOM_OFFSET_Y=%d" \
+			" %s" \
+			" && %s > %s" \
+			% (opts.compiler, bin,
+				opts.compile_options,
+				opts.src,
+				opts.width, opts.height,
+				opts.tile_width, opts.tile_height,
+				x, y,
+				opts.darkcult_cpp,
+				bin, out
 				)
-			commands.append(command);
+	return any(pool.map(
+		compile,
+		[format_command(x, y)
+			for x in range(0, opts.width, opts.tile_width)
+			for y in range(0, opts.height, opts.tile_height)
+			]
+		))
 
-	pool = multiprocessing.Pool(max_procs)
-	sys.exit(any(pool.map(compile, commands)))
+if __name__=="__main__":
+	sys.exit(main())
diff --git a/tools/darkroom/darkcult.sh b/tools/darkroom/darkcult.sh
index 1912ed26..19f01a16 100755
--- a/tools/darkroom/darkcult.sh
+++ b/tools/darkroom/darkcult.sh
@@ -8,6 +8,7 @@
 # =============================================================================
 #
 # requires: Netpbm (http://netpbm.sourceforge.net/)
+# requires: Python (http://www.python.org/) if parallel mode
 #
 src="../../example/darkroom/two_spheres.hpp"
 stagedir="darkroom"
@@ -85,6 +86,8 @@ if [ ${use_help} -ne 0 ]; then
 	echo "  -I, --include=<dir>         Add system include path."
 	echo ""
 	echo "  -P, --max-procs=<value>     The maximum number of process use."
+	echo "                              If other than 1, processing in parallel mode."
+	echo "                              If 0, using the number of CPUs in the system."
 	echo "                              Default; 1"
 	echo ""
 	echo "  -f, --force                 Allow overwrite of <stagedir>."
@@ -102,12 +105,8 @@ echo "  width = ${width}"
 echo "  height = ${height}"
 echo "  tile-width = ${tile_width}"
 echo "  tile-height = ${tile_height}"
-if [ ${#user_macros[*]} -gt 0 ]; then
-	echo "  user-macros = (${user_macros[*]})"
-fi
-if [ ${#include_paths[*]} -gt 0 ]; then
-	echo "  include-paths = (${include_paths[*]})"
-fi
+echo "  user-macros = (${user_macros[*]})"
+echo "  include-paths = (${include_paths[*]})"
 echo "  max-procs = ${max_procs}"
 echo "  force = ${force}"
 
@@ -116,6 +115,14 @@ if [ ! -f "${src}" -a ! -f "$(cd $(dirname $0); pwd)/${src}" ]; then
 	exit 1
 fi
 
+for user_macro in ${user_macros}; do
+	define_options="${define_options} -D${user_macro}"
+done
+for include_path in ${include_paths}; do
+	include_options="${include_options} -I${include_path}"
+done
+compile_options="-std=c++11 ${define_options} ${include_options}"
+
 if [ -d "${stagedir}" ]; then
 	if [ ${force} -eq 0 ]; then
 		echo >&2 "error: stagedir(${stagedir}) already exists."
@@ -126,21 +133,10 @@ if [ -d "${stagedir}" ]; then
 else
 	mkdir -p ${stagedir}
 fi
-
-for user_macro in ${user_macros}; do
-	define_options="${define_options} -D${user_macro}"
-done
-
-for include_path in ${include_paths}; do
-	include_options="${include_options} -I${include_path}"
-done
-
 for ((y=0; y<height; y+=tile_height)); do
 	mkdir -p ${stagedir}/${y}/
 done
 
-compile_options="-std=c++11 ${define_options} ${include_options}"
-
 echo "rendering:"
 start=${SECONDS}
 
@@ -151,22 +147,22 @@ if [ ${max_procs} -eq 1 ]; then
 
 		echo -n "    x = "
 		for ((x=0; x<width; x+=tile_width)); do
-			echo -n "(${x}/${height})..."
-			binname=${y}/${x}.out
-			bin=${stagedir}/${binname}
+			echo -n "(${x}/${height})."
+			bin=${stagedir}/${y}/${x}.out
+			out=${stagedir}/${y}/${x}.ppm
 			${compiler} -o ${bin} \
 				${compile_options} \
 				-DDARKROOM_SOURCE="\"${src}\"" \
 				-DDARKROOM_TOTAL_WIDTH=${width} -DDARKROOM_TOTAL_HEIGHT=${height} \
 				-DDARKROOM_TILE_WIDTH=${tile_width} -DDARKROOM_TILE_HEIGHT=${tile_height} \
 				-DDARKROOM_OFFSET_X=${x} -DDARKROOM_OFFSET_Y=${y} \
-				${darkcult_cpp}
+				${darkcult_cpp} \
+				&& ${bin} > ${out}
 			if [ $? -ne 0 ]; then
 				echo ""
-				echo >&2 "error: compile(${binname}) failed."
+				echo >&2 "error: compile(${y}/${x}) failed."
 				exit 1
 			fi
-			${bin} > ${stagedir}/${y}/${x}.ppm
 		done
 		echo ""
 
@@ -177,11 +173,11 @@ else
 	echo "  processing in parallel mode."
 	echo -n "  "
 	python "${darkcult_py}" \
-		"${src}" "${stagedir}" "${output}" "${compiler}" \
-		"${width}" "${height}" \
-		"${tile_width}" "${tile_height}" \
-		"${compile_options}" "${darkcult_cpp}" \
-		"${max_procs}"
+		"--src=${src}" "--stagedir=${stagedir}" "--output=${output}" "--compiler=${compiler}" \
+		"--width=${width}" "--height=${height}" \
+		"--tile_width=${tile_width}" "--tile_height=${tile_height}"" "\
+		"--compile_options=${compile_options}" "--darkcult_cpp=${darkcult_cpp}" \
+		"--max_procs=${max_procs}"
 	if [ $? -ne 0 ]; then
 		echo ""
 		echo >&2 "error: compile failed."
@@ -195,12 +191,10 @@ echo "  elapsed(total) = ${elapsed}s"
 
 for ((y=0; y<height; y+=tile_height)); do
 	pushd ${stagedir}/${y}/ > /dev/null
-#	convert +append $(ls *.ppm | sort -n) ../${y}.ppm
 	pnmcat -lr $(ls *.ppm | sort -n) > ../${y}.ppm
 	popd > /dev/null
 done
 pushd ${stagedir} > /dev/null
-#convert -append $(ls *.ppm | sort -n) ${output}
 pnmcat -tb $(ls *.ppm | sort -n) > ${output}
 popd > /dev/null