diff --git a/share/grafx2/scripts/pic_ni_GlassGridFilter.lua b/share/grafx2/scripts/pic_ni_GlassGridFilter.lua
index 0dbdca3b..3aa7e22e 100644
--- a/share/grafx2/scripts/pic_ni_GlassGridFilter.lua
+++ b/share/grafx2/scripts/pic_ni_GlassGridFilter.lua
@@ -1,19 +1,12 @@
--- Glass grid filter
-
--- Copyright 2010 Paulo Silva
---
--- 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; version 2
--- of the License. See <http://www.gnu.org/licenses/>
-
+-- Glass grid filter - Copyright 2010 Paulo Silva
+-- 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; version 2 of the License. See <http://www.gnu.org/licenses/>
 w,h=getpicturesize();
-for y1=0,h-1,8 do
-  for x1=0,w-1,8 do
-    for y2=0,3,1 do
-      for x2=0,7,1 do
-        c1=getpicturepixel(x1+x2,y1+y2)
-        c2=getpicturepixel(x1+7-x2,y1+7-y2)
-        putpicturepixel(x1+x2,y1+y2,c2)
-        putpicturepixel(x1+7-x2,y1+7-y2,c1)
-        end;end;end;end
+ok,xsiz,ysiz=inputbox("message","xsize",8,0,64,5,"ysize",8,0,64,6);
+if ok==true then
+  for y1=0,h-1,xsiz do
+    for x1=0,w-1,ysiz do
+      for y2=0,(ysiz/2)-1,1 do
+        for x2=0,xsiz-1,1 do
+          c1=getpicturepixel(x1+x2,y1+y2);c2=getpicturepixel(x1+(xsiz-1)-x2,y1+(ysiz-1)-y2)
+          putpicturepixel(x1+x2,y1+y2,c2);putpicturepixel(x1+(xsiz-1)-x2,y1+(ysiz-1)-y2,c1)
+          end;end;end;end;end
diff --git a/share/grafx2/scripts/pic_ni_cellcolourreducer.lua b/share/grafx2/scripts/pic_ni_cellcolourreducer.lua
new file mode 100644
index 00000000..3f97a8c0
--- /dev/null
+++ b/share/grafx2/scripts/pic_ni_cellcolourreducer.lua
@@ -0,0 +1,37 @@
+-- cell colour reducer - jan'11, from Paulo Silva, with help from people from GrafX2 google group (DawnBringer, Adrien Destugues (PulkoMandy), and Yves Rizoud)
+-- 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; version 2 of the License. See <http://www.gnu.org/licenses/>
+w,h=getpicturesize()
+ok,xcell,ycell=inputbox("Modify cell pixel size","xcell",8,1,16,4,"ycell",8,1,16,4);
+if ok==true then
+  function grayscaleindexed(c)
+    r,g,b=getcolor(c);return math.floor((b*11+r*30+g*59)/100);end
+  celcnt={};for n=0,255,1 do celcnt[n+1]=0;end -- Arraycounter must have initial value
+  for y1=0,h-1,ycell do
+    for x1=0,w-1,xcell do
+      for i=0,255,1 do
+        celcnt[i+1]=0;end
+      for y2=0,ycell-1,1 do
+        for x2=0,xcell-1,1 do
+           x=x1+x2;y=y1+y2;u=getpicturepixel(x,y)
+           celcnt[u+1]=celcnt[u+1]+(1000*xcell*ycell)+math.random(0,950);end;end
+      ikattr=0;paattr=0;ikcnt=0;pacnt=0
+      for i=0,255,1 do
+        if ikcnt<celcnt[i+1] then ikcnt=celcnt[i+1];ikattr=i;end;end
+      celcnt[ikattr+1]=0
+      for i=0,255,1 do
+        if pacnt<celcnt[i+1] then pacnt=celcnt[i+1];paattr=i;end;end
+      if grayscaleindexed(ikattr)>grayscaleindexed(paattr) then tmpr=ikattr;ikattr=paattr;paattr=tmpr;end
+      wmid=math.floor((grayscaleindexed(paattr)+grayscaleindexed(ikattr))/2)
+      for y2=0,ycell-1,1 do
+        for x2=0,xcell-1,1 do
+          x=x1+x2;y=y1+y2;u=getpicturepixel(x,y)
+          if u==ikattr then
+            idou=ikattr
+          elseif u==paattr then
+            idou=paattr
+          else
+            idou=ikattr
+            if grayscaleindexed(u)>wmid then idou=paattr;end
+            end
+          putpicturepixel(x,y,idou)
+          end;end;end;end;end
diff --git a/share/grafx2/scripts/pic_ni_drawgridisometric.lua b/share/grafx2/scripts/pic_ni_drawgridisometric.lua
new file mode 100644
index 00000000..1dd304db
--- /dev/null
+++ b/share/grafx2/scripts/pic_ni_drawgridisometric.lua
@@ -0,0 +1,13 @@
+-- Draw isometric grid - Copyright 2010 Paulo Silva
+-- 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; version 2 of the License. See <http://www.gnu.org/licenses/>
+w,h=getpicturesize();
+ok,gsiz,ik=inputbox("draw isometric grid","size",16,0,128,5,"colour",1,0,255,6);
+if ok==true then
+  for y=0,h-1,gsiz do
+    for x=0,w-1,1 do
+      putpicturepixel(x,y+(x/2)%gsiz,ik);
+      end;end
+  for y=0,h-1,gsiz do
+    for x=0,w-1,1 do
+      putpicturepixel(x+((gsiz/2)-1),y+(gsiz-1)-((x/2)%gsiz),ik);
+      end;end;end
diff --git a/share/grafx2/scripts/pic_ni_drawgridorthogonal_indexedcolour.lua b/share/grafx2/scripts/pic_ni_drawgridorthogonal_indexedcolour.lua
new file mode 100644
index 00000000..7f4aafcd
--- /dev/null
+++ b/share/grafx2/scripts/pic_ni_drawgridorthogonal_indexedcolour.lua
@@ -0,0 +1,11 @@
+-- draw grid - indexed colour - Copyright 2010 Paulo Silva
+-- 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; version 2 of the License. See <http://www.gnu.org/licenses/>
+w,h=getpicturesize();
+ok,xsiz,ysiz,c=inputbox("draw grid - indexed colour)","x size",8,1,64,5,"y size",8,1,64,6,"colour id",0,0,255,6);
+if ok==true then
+  for y=0,h-1,1 do
+    for x=0,w-1,xsiz do
+      putpicturepixel(x,y,c);end;end 
+  for y=0,h-1,ysiz do 
+    for x=0,w-1,1 do 
+      putpicturepixel(x,y,c);end;end;end
diff --git a/share/grafx2/scripts/pic_ni_drawgridorthogonal_rgbmatchcolor.lua b/share/grafx2/scripts/pic_ni_drawgridorthogonal_rgbmatchcolor.lua
new file mode 100644
index 00000000..729243fc
--- /dev/null
+++ b/share/grafx2/scripts/pic_ni_drawgridorthogonal_rgbmatchcolor.lua
@@ -0,0 +1,14 @@
+-- draw grid - rgb (matchcolor) - Copyright 2010 Paulo Silva
+-- 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; version 2 of the License. See <http://www.gnu.org/licenses/>
+w,h=getpicturesize()
+ok,xsiz,ysiz,r,g,b=inputbox("draw grid - rgb (matchcolor)","x size",8,1,64,5,"y size",8,1,64,6,"r",128,0,255,6,"g",128,0,255,6,"b",128,0,255,6);
+if ok==true then
+  c=matchcolor(r,g,b) 
+  for y=0,h-1,1 do 
+    for x=0,w-1,xsiz do 
+      putpicturepixel(x,y,c); 
+      end;end 
+  for y=0,h-1,ysiz do 
+    for x=0,w-1,1 do 
+      putpicturepixel(x,y,c); 
+      end;end;end
diff --git a/share/grafx2/scripts/pic_ni_flippicture.lua b/share/grafx2/scripts/pic_ni_flippicture.lua
new file mode 100644
index 00000000..3c1a4d62
--- /dev/null
+++ b/share/grafx2/scripts/pic_ni_flippicture.lua
@@ -0,0 +1,17 @@
+-- flip picture - Copyright 2010 Paulo Silva
+-- 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; version 2 of the License. See <http://www.gnu.org/licenses/>
+w,h=getpicturesize();
+ok,flipx,flipy=inputbox("flip picture","flip x",1,0,1,-1,"flip y",0,0,1,-1);
+if ok==true then
+  if flipx==1 then
+    for y=0,h-1,1 do 
+      for x=0,w/2,1 do 
+        c1=getpicturepixel(x,y);c2=getpicturepixel(w-x-1,y) 
+        putpicturepixel(x,y,c2);putpicturepixel(w-x-1,y,c1) 
+        end;end 
+  else
+    for y=0,h/2,1 do 
+      for x=0,w-1,1 do 
+        c1=getpicturepixel(x,y);c2=getpicturepixel(x,h-y-1) 
+        putpicturepixel(x,y,c2);putpicturepixel(x,h-y-1,c1) 
+        end;end;end;end
diff --git a/share/grafx2/scripts/pic_ni_palettetopicture.lua b/share/grafx2/scripts/pic_ni_palettetopicture.lua
new file mode 100644
index 00000000..a645fd34
--- /dev/null
+++ b/share/grafx2/scripts/pic_ni_palettetopicture.lua
@@ -0,0 +1,11 @@
+-- palette to picture - Copyright 2010 Paulo Silva
+-- 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; version 2 of the License. See <http://www.gnu.org/licenses/>
+w,h=getpicturesize(); 
+ok,xsiz,ysiz=inputbox("palette to picture","x size",8,1,16,5,"y size",8,1,16,6);
+if ok==true then
+  for y1=0,7,1 do 
+    for x1=0,31,1 do 
+      for y2=0,ysiz-1,1 do 
+        for x2=0,xsiz-1,1 do 
+          putpicturepixel(x1*xsiz+x2,y1*ysiz+y2,y1+x1*8) 
+          end;end;end;end;end
diff --git a/share/grafx2/scripts/pic_ni_xbitcolourspacefrompalette.lua b/share/grafx2/scripts/pic_ni_xbitcolourspacefrompalette.lua
new file mode 100644
index 00000000..444e62fa
--- /dev/null
+++ b/share/grafx2/scripts/pic_ni_xbitcolourspacefrompalette.lua
@@ -0,0 +1,12 @@
+-- Copyright 2010 Paulo Silva
+-- 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; version 2 of the License. See <http://www.gnu.org/licenses/>
+w,h=getpicturesize();
+ok,bitd=inputbox("colourspace from palette","bitdepth:",4,1,8,5);
+if ok==true then
+  bitd3=(2^bitd);bitd8=(2^(math.floor(bitd/2)));bitd9=(2^((math.floor((bitd-1)/2))+1))
+  for y1=0,(bitd8-1),1 do 
+    for x1=0,(bitd9-1),1 do 
+      for y2=0,(bitd3-1),1 do 
+        for x2=0,(bitd3-1),1 do 
+          putpicturepixel(x1*bitd3+x2,y1*bitd3+y2,matchcolor((y2*255)/(bitd3-1),((y1*8+x1)*255)/(bitd3-1),(x2*255)/(bitd3-1))) 
+          end;end;end;end;end