diff --git a/mods/u_skins/MT_skins_updater.exe b/mods/u_skins/MT_skins_updater.exe
deleted file mode 100755
index 5b4ee3e4..00000000
Binary files a/mods/u_skins/MT_skins_updater.exe and /dev/null differ
diff --git a/mods/u_skins/Newtonsoft.Json.dll b/mods/u_skins/Newtonsoft.Json.dll
deleted file mode 100755
index 054c9337..00000000
Binary files a/mods/u_skins/Newtonsoft.Json.dll and /dev/null differ
diff --git a/mods/u_skins/generate_previews.py b/mods/u_skins/generate_previews.py
new file mode 100755
index 00000000..460f7f91
--- /dev/null
+++ b/mods/u_skins/generate_previews.py
@@ -0,0 +1,85 @@
+#!/bin/env python2
+
+from __future__ import print_function
+import sys, os, subprocess
+from os import listdir
+from os.path import isfile, join, sep
+
+def eprint(*args, **kwargs):
+    print(*args, file=sys.stderr, **kwargs)
+
+def which(program):
+    import os
+    def is_exe(fpath):
+        return os.path.isfile(fpath) and os.access(fpath, os.X_OK)
+
+    fpath, fname = os.path.split(program)
+    if fpath:
+        if is_exe(program):
+            return program
+    else:
+        for path in os.environ["PATH"].split(os.pathsep):
+            path = path.strip('"')
+            exe_file = os.path.join(path, program)
+            if is_exe(exe_file):
+                return exe_file
+
+    return None
+
+try:
+    from PIL import Image
+except ImportError:
+    eprint("Could not import PIL, is it installed ?")
+    sys.exit(1)
+
+uskins_path = "u_skins"
+meta_path = join(uskins_path, "meta")
+textures_path = join(uskins_path, "textures")
+pngcrush = which('pngcrush')
+optipng = which('optipng')
+
+def process_copies(src, dst, copies):
+    for copy in copies:
+        srcrect = copy[0]
+        dstrect = copy[1]
+        flip = copy[2] if len(copy) > 2 else None
+        region = src.crop(srcrect)
+        if flip is not None:
+            region = region.transpose(flip)
+        dst.paste(region, dstrect)
+
+def make_preview(src, dst):
+    skin = Image.open(src)
+    preview = Image.new('RGBA', (16, 32))
+    process_copies(skin, preview, [
+        [(8, 8, 16, 16), (4, 0)], # Head
+        [(44, 20, 48, 32), (0, 8)], # Left arm
+        [(44, 20, 48, 32), (12, 8), Image.FLIP_LEFT_RIGHT], # Right arm
+        [(20, 20, 28, 32), (4, 8)], # Body
+        [(4, 20, 8, 32), (4, 20)], # Left leg
+        [(4, 20, 8, 32), (8, 20), Image.FLIP_LEFT_RIGHT], # Right leg
+    ])
+    overlay = Image.new('RGBA', (16, 32))
+    process_copies(skin, overlay, [
+        [(40, 8, 48, 16), (4, 0)], # Head
+    ])
+    preview = Image.alpha_composite(preview, overlay)
+    preview.save(dst)
+    if optipng is not None:
+        p = subprocess.Popen([optipng, '-o7', '-quiet', dst])
+        p.wait()
+    elif pngcrush is not None:
+        p = subprocess.Popen([pngcrush, '-ow', '-s', dst])
+        p.wait()
+
+if __name__ == '__main__':
+    metas = [f for f in listdir(meta_path) if
+             isfile(join(meta_path, f)) and
+             f.endswith(".txt")]
+    for meta in metas:
+        f = open(join(meta_path, meta), 'r')
+        metadata = f.read().splitlines()
+        f.close()
+        skin = meta[:-4]
+        print("Processing {} \"{}\" by {} ({})...".format(skin, metadata[0], metadata[1], metadata[2]))
+        make_preview(join(textures_path, skin + ".png"), join(textures_path, skin + "_preview.png"))
diff --git a/mods/u_skins/generate_previews.sh b/mods/u_skins/generate_previews.sh
deleted file mode 100755
index 1ff66505..00000000
--- a/mods/u_skins/generate_previews.sh
+++ /dev/null
@@ -1,49 +0,0 @@
-#!/bin/sh
-# This script is used to generate the previews needed by the mod
-# It requires blender with the latest python API (2.6x is tested)
-# A script that works with older blenders and, maybe, without python, is available in older commits.
-# This script can also use pngcrush and imagemagick to reduce output size,
-#   please enable them if you want to push to the git repository of the mod.
-# Pngcrush output will be written to .previews/pngcrush_output
-# Warning: any file in .previews/ and u_skins/textures might be deleted without asking.
-PNGCRUSH=true
-IMAGEMAGICK=true
-cd .previews
-rm ../u_skins/textures/character_*_preview*.png # Remove all previous previews
-blender -b skin_previews.blend --python-text "Generate previews" > /dev/null
-if $IMAGEMAGICK
-	then echo "Stripping metadata from generated files..."
-	else echo "Moving files..."
-fi
-rm -rf output # remove my output
-mkdir -p output
-for i in blender_out/character_*_00.png;
-do
-	out_name=$(basename $i | sed -e 's/_00.png//g')
-	out_file=output/"$out_name"_preview.png
-	if $IMAGEMAGICK
-	then
-		convert -strip -resize 128x256 $i $out_file
-	else
-		mv $i $out_file
-	fi
-done
-
-#for i in blender_out/character_*_01.png;
-#do
-#	out_name=$(basename $i | sed -e 's/_01.png//g')
-#	out_file=output/"$out_name"_preview_back.png
-#	if $IMAGEMAGICK
-#	then
-#		convert -strip -resize 32x64 $i $out_file
-#	else
-#		mv $i $out_file
-#	fi
-#done
-if $PNGCRUSH
-	then
-		echo "Running pngcrush..."
-		pngcrush -d ../u_skins/textures/ output/character_*_preview*.png 2> pngcrush_output
-	else mv output/character_*_preview*.png ../u_skins/textures/
-fi
-echo "Done !"
diff --git a/mods/u_skins/generate_previews_mff.sh b/mods/u_skins/generate_previews_mff.sh
deleted file mode 100755
index a07a3f94..00000000
--- a/mods/u_skins/generate_previews_mff.sh
+++ /dev/null
@@ -1,49 +0,0 @@
-#!/bin/sh
-# This script is used to generate the previews needed by the mod
-# It requires blender with the latest python API (2.6x is tested)
-# A script that works with older blenders and, maybe, without python, is available in older commits.
-# This script can also use pngcrush and imagemagick to reduce output size,
-#   please enable them if you want to push to the git repository of the mod.
-# Pngcrush output will be written to .previews/pngcrush_output
-# Warning: any file in .previews/ and u_skins/textures might be deleted without asking.
-PNGCRUSH=true
-IMAGEMAGICK=true
-cd .previews
-rm ../u_skins/textures/mff_*_preview*.png # Remove all previous previews
-blender -b mff_skin_previews.blend --python-text "Generate previews" > /dev/null
-if $IMAGEMAGICK
-	then echo "Stripping metadata from generated files..."
-	else echo "Moving files..."
-fi
-rm -rf output # remove my output
-mkdir -p output
-for i in blender_out/mff_character_*_00.png
-do
-	out_name=$(basename $i | sed -e 's/_00.png//g')
-	out_file=output/"$out_name"_preview.png
-	if $IMAGEMAGICK
-	then
-		convert -strip -resize 128x256 $i $out_file
-	else
-		mv $i $out_file
-	fi
-done
-
-#for i in blender_out/mff_character_*_01.png
-#do
-#	out_name=$(basename $i | sed -e 's/_01.png//g')
-#	out_file=output/"$out_name"_preview_back.png
-#	if $IMAGEMAGICK
-#	then
-#		convert -strip -resize 32x64 $i $out_file
-#	else
-#		mv $i $out_file
-#	fi
-#done
-if $PNGCRUSH
-	then
-		echo "Running pngcrush..."
-		pngcrush -d ../u_skins/textures/ output/mff_*_preview*.png 2> pngcrush_output
-	else mv output/mff_*_preview*.png ../u_skins/textures/
-fi
-echo "Done !"
diff --git a/mods/u_skins/placeholder.txt b/mods/u_skins/placeholder.txt
deleted file mode 100755
index a9e6fce1..00000000
--- a/mods/u_skins/placeholder.txt
+++ /dev/null
@@ -1 +0,0 @@
-Please run the update_from_db.py script to update the skins.
diff --git a/mods/u_skins/purge_skins.py b/mods/u_skins/purge_skins.py
deleted file mode 100755
index 8cfa7ab0..00000000
--- a/mods/u_skins/purge_skins.py
+++ /dev/null
@@ -1,42 +0,0 @@
-#!/usr/bin/env python
-# -*- coding: UTF-8 -*-
-
-import sys, os
-
-# if used on windows ??
-# use os.path.join() -> path sep win "\" or linux "/"
-p_textures = os.path.join("u_skins", "textures")
-p_meta = os.path.join("u_skins", "meta")
-
-try:
-	f = open("removed_skins.txt", "r")
-	skins_exclued = f.readlines()
-except IOError as err:
-	sys.stderr.write("%s\n" % err)
-	sys.exit(1)
-else:
-	f.close()
-
-print("il y a %d skins exclus." % len(skins_exclued))
-
-for skin in skins_exclued:
-	# if not int value, ignore
-	try:
-		skin = "character_%s" % int(skin.strip())
-	except ValueError as err:
-		sys.stderr.write("%s\n" % err)
-		continue
-	# for texture, preview and meta files
-	for f_skin in ( os.path.join(p_textures,"%s.png" % skin),
-					os.path.join(p_textures,"%s_preview.png" % skin),
-					os.path.join(p_meta, "%s.txt" % skin) ):
-		if os.path.exists(f_skin):
-			try:
-				os.remove(f_skin)
-			except exception as err:
-				print(err)
-				pass
-			else:
-				print('skin "%s" effacé' % f_skin)
-
-sys.exit(0)
diff --git a/mods/u_skins/removed_skins.txt b/mods/u_skins/removed_skins.txt
deleted file mode 100755
index e69de29b..00000000
diff --git a/mods/u_skins/set_meta.sh b/mods/u_skins/set_meta.sh
deleted file mode 100755
index 1db43cd9..00000000
--- a/mods/u_skins/set_meta.sh
+++ /dev/null
@@ -1,59 +0,0 @@
-#!/bin/bash
-SPRITES=$(find -regextype sed -regex '.*/player_[0-9]\{1,\}.png' | sort -V)
-MODELS=$(find -regextype sed -regex '.*/character_[0-9]\{1,\}.png' | sort -V)
-function ask_for_meta {
-	convert $2 -scale 100x200 /tmp/skins_set_meta
-	SNAME=$(basename $1)
-	SNAME=${SNAME%.*}
-	METAFILE=u_skins/meta/$SNAME.txt
-	FORCE=$3
-	if $FORCE || ! [ -f $METAFILE ]
-	then
-		echo $METAFILE
-		YADOUT=$(yad --form --image=/tmp/skins_set_meta --field $SNAME:LBL --field=Name --field=Author --field=Description --field=Comment)
-		if [ -z "$YADOUT" ]; then exit; fi # canceled
-		OIFS="$IFS"
-		IFS='|'
-		read -a VALUES <<< "$YADOUT"
-		IFS="$OIFS"
-		NAME=${VALUES[1]}
-		AUTHOR=${VALUES[2]}
-		DESCRIPTION=${VALUES[3]}
-		COMMENT=${VALUES[4]}
-		if [ -n "$NAME" ] && [ -n "$AUTHOR" ]
-		then
-			echo -n > $METAFILE # clear it
-			echo 'name = "'$NAME'",' >> $METAFILE
-			echo 'author = "'$AUTHOR'",' >> $METAFILE
-			# only write description and comment if they are specified
-			if [ -n "$DESCRIPTION" ]
-			then
-				echo 'description = "'$DESCRIPTION'",' >> $METAFILE
-			fi
-			if [ -n "$COMMENT" ]
-			then
-				echo 'comment = "'$COMMENT'",' >> $METAFILE
-			fi
-			echo "Saved !"
-		fi
-	fi
-}
-if [ -z $1 ]
-then
-	for i in $SPRITES
-	do
-		ask_for_meta $i $i false
-	done
-	for i in $MODELS
-	do
-		ask_for_meta $i ${i%.*}_preview.png false
-	done
-else
-	if [ -f ${1%.*}_preview.png ]
-	then
-		ask_for_meta $1 ${1%.*}_preview.png true
-	else
-		ask_for_meta $1 $1 true
-	fi
-fi
-rm /tmp/skins_set_meta
diff --git a/mods/u_skins/u_skins/textures/character_1.png b/mods/u_skins/u_skins/textures/character_1.png
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diff --git a/mods/u_skins/u_skins/textures/character_37_preview.png b/mods/u_skins/u_skins/textures/character_37_preview.png
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diff --git a/mods/u_skins/u_skins/textures/character_38_preview.png b/mods/u_skins/u_skins/textures/character_38_preview.png
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diff --git a/mods/u_skins/u_skins/textures/character_39_preview.png b/mods/u_skins/u_skins/textures/character_39_preview.png
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diff --git a/mods/u_skins/u_skins/textures/character_3_preview.png b/mods/u_skins/u_skins/textures/character_3_preview.png
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diff --git a/mods/u_skins/u_skins/textures/character_4.png b/mods/u_skins/u_skins/textures/character_4.png
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diff --git a/mods/u_skins/u_skins/textures/character_40_preview.png b/mods/u_skins/u_skins/textures/character_40_preview.png
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diff --git a/mods/u_skins/u_skins/textures/character_5_preview.png b/mods/u_skins/u_skins/textures/character_5_preview.png
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diff --git a/mods/u_skins/u_skins/textures/mff_character_1.png b/mods/u_skins/u_skins/textures/mff_character_1.png
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diff --git a/mods/u_skins/u_skins/textures/mff_character_5.png b/mods/u_skins/u_skins/textures/mff_character_5.png
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diff --git a/mods/u_skins/u_skins/textures/mff_character_6.png b/mods/u_skins/u_skins/textures/mff_character_6.png
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diff --git a/mods/u_skins/u_skins/textures/mff_character_7.png b/mods/u_skins/u_skins/textures/mff_character_7.png
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diff --git a/mods/u_skins/u_skins/textures/mff_character_8_preview.png b/mods/u_skins/u_skins/textures/mff_character_8_preview.png
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diff --git a/mods/u_skins/u_skins/textures/mff_character_9_preview.png b/mods/u_skins/u_skins/textures/mff_character_9_preview.png
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diff --git a/mods/u_skins/update_from_db.py b/mods/u_skins/update_from_db.py
deleted file mode 100755
index 71e94140..00000000
--- a/mods/u_skins/update_from_db.py
+++ /dev/null
@@ -1,61 +0,0 @@
-#!/usr/bin/python3
-from http.client import HTTPConnection
-import json
-import base64
-
-server = "minetest.fensta.bplaced.net"
-skinsdir = "u_skins/textures/"
-metadir = "u_skins/meta/"
-i = 1
-pages = 1
-
-c = HTTPConnection(server)
-def addpage(page):
-	global i, pages
-	print("Page: " + str(page))
-	r = 0
-	try:
-		c.request("GET", "/api/get.json.php?getlist&page=" + str(page) + "&outformat=base64")
-		r = c.getresponse()
-	except Exception:
-		if r != 0:
-			if r.status != 200:
-				print("Error", r.status)
-				exit(r.status)
-		return
-
-	data = r.read().decode()
-	l = json.loads(data)
-	if not l["success"]:
-		print("Success != True")
-		exit(1)
-	r = 0
-	pages = int(l["pages"])
-	for s in l["skins"]:
-		f = open(skinsdir + "character_" + str(i) + ".png", "wb")
-		f.write(base64.b64decode(bytes(s["img"], 'utf-8')))
-		f.close()
-		f = open(metadir + "character_" + str(i) + ".txt", "w")
-		f.write(str(s["name"]) + '\n')
-		f.write(str(s["author"]) + '\n')
-		f.write(str(s["license"]))
-		f.close()
-		try:
-			c.request("GET", "/skins/1/" + str(s["id"]) + ".png")
-			r = c.getresponse()
-		except Exception:
-			if r != 0:
-				if r.status != 200:
-					print("Error", r.status)
-			continue
-
-		data = r.read()
-		f = open(skinsdir + "character_" + str(i) + "_preview.png", "wb")
-		f.write(data)
-		f.close()
-		i = i + 1
-addpage(1)
-if pages > 1:
-	for p in range(pages-1):
-		addpage(p+2)
-print("Skins have been updated!")
diff --git a/mods/u_skins/update_from_db2.py b/mods/u_skins/update_from_db2.py
deleted file mode 100755
index 0afe1c9d..00000000
--- a/mods/u_skins/update_from_db2.py
+++ /dev/null
@@ -1,45 +0,0 @@
-#!/usr/bin/python3
-#from http.client import HTTPConnection
-import json
-import base64
-import requests
-
-server = "minetest.fensta.bplaced.net"
-skinsdir = "u_skins/textures/"
-metadir = "u_skins/meta/"
-i = 1
-pages = 0
-
-#c = HTTPConnection(server)
-def addpage(page):
-	global i, pages
-	print( "Page: "+str(page))
-	try:
-		#c.request("GET","/api/get.json.php?getlist&page="+str(page)+"&outformat=base64")
-		#r = c.getresponse()
-		r = requests.get("http://"+str(server)+"/api/get.json.php?getlist&page="+str(page)+"&outformat=base64")
-	except StandardError:
-		print("Error", r.status)
-		exit(r.status)
-	data = r.text
-	l = json.loads(data)
-	if not l["success"]:
-		print("Success != True")
-		exit(1)
-	pages = int(l["pages"])
-	for s in l["skins"]:
-		f = open(skinsdir+"character_"+str(i)+".png",'wb')
-		f.write(base64.b64decode(s["img"]))
-		f.close()
-		f = open(metadir+"character_"+str(i)+".txt",'w')
-		f.write('name = "'+s["name"]+'",\n')
-		f.write('author = "'+s["author"]+'",\n')
-		f.write('comment = "'+s["license"]+'",\n')
-		f.close()
-		i = i + 1
-addpage(1)
-if pages > 1:
-	for p in range(pages-1):
-		addpage(p+2)
-print("Skins have been updated. Please run ./generate_previews.sh")
-
diff --git a/mods/u_skins/update_skins_db.sh b/mods/u_skins/update_skins_db.sh
deleted file mode 100755
index 8bf9e1a2..00000000
--- a/mods/u_skins/update_skins_db.sh
+++ /dev/null
@@ -1,78 +0,0 @@
-#!/bin/bash
-####
-# Licenced under Attribution-NonCommercial-ShareAlike 4.0 International 
-# http://creativecommons.org/licenses/by-nc-sa/4.0/
-#### ATTENTION ####
-## This script requires that jq and coreutils are installed on your system ##
-## In Debian-based distros, open a terminal and run 
-## 	sudo apt-get install jq coreutils
-###################
-
-# == Set variables ===
-# ====================
-NUMPAGES="1"	# Number of pages. Default is 1 page
-PERPAGE="2000"  # Number of items per page. Default is 2000.
-JSONURL="http://minetest.fensta.bplaced.net/api/get.json.php?getlist&page=$NUMPAGES&outformat=base64&per_page=$PERPAGE"	# The URL to the database
-PREVIEWURL="http://minetest.fensta.bplaced.net/skins/1/"	# The url to the location of the previews.
-temp=$PWD/tmp			# Where the temp folder will be. Default is $PWD/tmp, which means that the tmp folder will be put in the current folder
-METADEST=$PWD/u_skins/meta		# This is the folder where the meta data will be saved
-TEXTUREDEST=$PWD/u_skins/textures	# This is the folder where the skins and the previews will be saved
-
-
-# === Make a bunch of folders and download the db ===
-# ===================================================
-if [ -d "$temp" ]; then
-    rm -r $temp				# If the temp dir exists we will remove it and its contents.
-fi
-mkdir $temp				# Make a new temp dir. Redundant? No. We will get rid of it later.
-
-if [ ! -d "$METADEST" ]; then		# Check to see if the meta dir exists, and if not, create it
-  mkdir $METADEST
-fi
-
-if [ ! -d "$TEXTUREDEST" ]; then	# Check to see if the textures dir exists, and if not, create it
-  mkdir $TEXTUREDEST
-fi
-
-wget $JSONURL -O $temp/rawdb.txt	# Download the entire database
-
-
-# === Do the JSON thing ===
-# =========================
-i="0" 	# This will be the counter.
-while [ "$ID" != "null" ] 	# Repeat for as long as there is data to process
-  do
-    ID=$(cat $temp/rawdb.txt | jq ".skins[$i].id")
-    
-    # The next lines are kinda complex. sed is being used to strip the quotes from the variables. I had help...
-    meta_name=$(echo $(cat $temp/rawdb.txt | jq ".skins[$i].name") | sed -e 's/^"//'  -e 's/"$//')
-    meta_author=$(echo $(cat $temp/rawdb.txt | jq ".skins[$i].author") | sed -e 's/^"//'  -e 's/"$//')
-    meta_license=$(echo $(cat $temp/rawdb.txt | jq ".skins[$i].license") | sed -e 's/^"//'  -e 's/"$//')
-    
-    if [[ "$ID" != "null" ]]; then 	# Check to see if ID has a value
-      echo "#"$ID "name:" $meta_name "author:" $meta_author "license:" $meta_license  # Verbosity to show that the script is working.      
-      
-      echo $meta_name > $METADEST/character_$ID.txt		# Save the meta data to files, this line overwrites the data inside the file
-      echo $meta_author  >> $METADEST/character_$ID.txt		# Save the meta data to files, this line is added to the file
-      echo $meta_license >> $METADEST/character_$ID.txt		# Save the meta data to files, and this line is added to the file as well.
-      
-      
-      # === Extract and save the image from the JSON file ===
-      # ======================================================
-      skin=$(echo $(cat $temp/rawdb.txt | jq ".skins[$i].img") | sed -e 's/^"//'  -e 's/"$//') # Strip the quotes from the base64 encoded string
-      echo $skin | base64 --decode > $TEXTUREDEST"/character_"$ID".png"		# Decode the string, and save it as a .png file
-      
-      
-      # === Download a preview image whilst we're at it ===
-      # ====================================================
-      wget -nv $PREVIEWURL/$ID".png" -O $TEXTUREDEST"/character_"$ID"_preview.png"      # Downloads a preview of the skin that we just saved.
-      
-    fi
-    i=$[$i+1] 	# Increase the counter by one.
-  done
-
-# === Now we'll clean up the mess ===
-# ===================================
-rm -r $temp	# Remove the temp dir and its contents.
-
-exit # Not strictly needed, but i like to use it to wrap things up.