diff --git a/gentextures-jpg.sh b/gentextures-jpg.sh
new file mode 100755
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+++ b/gentextures-jpg.sh
@@ -0,0 +1,183 @@
+#!/bin/bash
+
+# This program auto-generates colorized textures for all 89 of the Unified 
+# Dyes colors, based on one or two input files.
+
+# Copyright (C) 2012-2013, Vanessa Ezekowitz
+# Email: vanessaezekowitz@gmail.com
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License along
+# with this program; if not, write to the Free Software Foundation, Inc.,
+# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+
+if [ -z "`which convert`" ] ; then {
+	echo "Please install Imagemagick."
+	exit 1
+} fi
+
+if [ -z "`which bc`" ] ; then {
+	echo "Please install GNU bc."
+	exit 1
+} fi
+
+if [ $1 = "-t" ] ; then {
+	TINT_OVERLAY=$1
+	BASE=$2
+	COMPOSITE=$3
+} else {
+	TINT_OVERLAY=""
+	BASE=$1
+	COMPOSITE=$2
+} fi
+
+if [ -z $1 ] || [ $1 == "--help" ] || [ $1 == "-h" ] || [[ $1 == "-t" && -z $3 ]] ; then {
+
+	echo -e "\nUsage:
+\ngentextures.sh basename [overlay_filename]
+gentextures.sh -t basename overlay_filename
+
+\nThis script requires up to three parameters which supply the base 
+filename of the textures, an optional .png overlay, and possibly the 
+'-t' switch.  The 'basename' is the first part of the filename that your 
+textures will use when your mod is done, which should almost always be 
+the same as the one-word name of your mod.  For example, if you supply 
+the word 'mymod', this script will produce filenames like mymod_red.jpg 
+or 'mymod_dark_blue_s50.jpg'.  The texture that this script will read 
+and recolor is derived from this parameter, and will be of the form 
+'basename_base.jpg', i.e. 'mymod_base.jpg'. \nYou can also supply an 
+overlay image filename.  This image needs to be a .png or .gif or some 
+other alpha-capable format supported by ImageMagick, and will be 
+composited onto the output files after they have been colorized, but 
+without being modified.  This is useful when you have some part of your 
+base image that will either get changed undesirably (for example, the 
+mortar among several bricks, or the shading detail of a stone pattern).  
+Simply draw two images: one containing the whole image to be colored, 
+and one containing the parts that should not be changed, with either 
+full or partial alpha transparency where the re-colored base image 
+should show through.  Skilled use of color and alpha on this overlay can 
+lead to some interesting effects. \nIf you add '-t' as the first 
+parameter, the script will switch to 'tint overlay' mode.  For this mode 
+to work, you must also supply the base name as usual, and you must 
+include an overlay image filename.  Rather than re-color the base 
+texture, the script will alter the hue/saturation/value of the overlay 
+texture file instead, and leave the base texture unchanged.  When using 
+this mode, the base texture should be drawn in some neutral color, but 
+any color is fine if it results in what you wanted.\n"
+
+
+	exit 1
+} fi
+
+if [[ ! -e $BASE"_base.jpg" ]]; then {
+	echo -e "\nThe basename '"$BASE"_base.jpg' was not found."
+        echo -e "\nAborting.\n"
+	exit 1
+} fi
+
+if [[ ! -z $COMPOSITE && ! -e $COMPOSITE ]]; then {
+	echo -e "\nThe requested composite file '"$COMPOSITE"' was not found."
+        echo -e "\nAborting.\n"
+	exit 1
+} fi
+
+convert $BASE"_base.jpg" -modulate 1,2,3 tempfile.jpg 1>/dev/null 2>/dev/null
+
+if (( $? )) ; then {
+	echo -e "\nImagemagick failed while testing the base texture file."
+	echo -e "\nEither the base file '"$BASE"_base.jpg' isn't an image,"
+	echo "or it is broken, or Imagemagick itself just didn't work."
+	echo -e "\nPlease check and correct your base image and try again."
+	echo -e "\nAborting.\n"
+	exit 1
+} fi
+
+if [ ! -z $COMPOSITE ] ; then {
+	convert $BASE"_base.jpg" -modulate 1,2,3 $COMPOSITE -composite tempfile.jpg 1>/dev/null 2>/dev/null
+
+	if (( $? )) ; then {
+		echo -e "\nImagemagick failed while testing the composite file."
+		echo -e "\nEither the composite file '"$COMPOSITE"' isn't an image"
+		echo "or it is broken, or Imagemagick itself just didn't work."
+		echo -e "\nPlease check and correct your composite image and try again."
+		echo -e "\nAborting.\n"
+		exit 1
+	} fi
+} fi
+
+rm tempfile.jpg
+
+base_colors="red orange yellow lime green aqua cyan skyblue blue violet magenta redviolet"
+
+echo -e -n "\nGenerating filenames based on "$BASE"_base.jpg"
+if [ ! -z $COMPOSITE ] ; then {
+	echo ","
+	echo -n "using "$COMPOSITE" as an overlay"
+} fi
+
+if [ ! -z $TINT_OVERLAY ] ; then {
+	echo ","
+	echo -n "and tinting the overlay instead of the base texture"
+} fi
+
+echo -e "...\n"
+
+mkdir -p generated-textures
+
+function generate_texture () {
+	name=$1
+	h=$2
+	s=$3
+	v=$4
+	if [ -z $TINT_OVERLAY ]; then {
+		if [ -z $COMPOSITE ]; then {
+			convert $BASE"_base.jpg" -modulate $v,$s,$h -quality 97 "generated-textures/"$BASE"_"$name".jpg"
+		} else {
+			convert $BASE"_base.jpg" -modulate $v,$s,$h -quality 97 $COMPOSITE -composite "generated-textures/"$BASE"_"$name".jpg"
+		} fi
+	} else {
+		convert $COMPOSITE -modulate $v,$s,$h -quality 97 MIFF:- | composite MIFF:- $BASE"_base.jpg" "generated-textures/"$BASE"_"$name".jpg"
+	} fi
+}
+
+hue=0
+for color_name in $base_colors ; do
+	hue2=`echo "scale=10; ("$hue"*200/360)+100" |bc`
+	echo $color_name "("$hue" degrees)"
+	echo "     dark"
+	generate_texture "dark_"$color_name $hue2 100 33
+	echo "     medium"
+	generate_texture "medium_"$color_name $hue2 100 66
+	echo "     full"
+	generate_texture $color_name $hue2 100 100
+	echo "     light"
+	generate_texture "light_"$color_name $hue2 100 150
+	echo "     dark, 50% saturation"
+	generate_texture "dark_"$color_name"_s50" $hue2 50 33
+	echo "     medium, 50% saturation"
+	generate_texture "medium_"$color_name"_s50" $hue2 50 66
+	echo "     full, 50% saturation"
+	generate_texture $color_name"_s50" $hue2 50 100 
+	hue=$((hue+30))
+done
+
+echo "greyscales"
+echo "     black"
+generate_texture black 0 0 15
+echo "     dark grey"
+generate_texture darkgrey 0 0 50
+echo "     medium grey"
+generate_texture grey 0 0 100
+echo "     light grey"
+generate_texture lightgrey 0 0 150
+echo "     white"
+generate_texture white 0 0 190