diff --git a/demos/second/part13_plasmacube/graphics/Makefile b/demos/second/part13_plasmacube/graphics/Makefile
index b19a5689..3c04b626 100644
--- a/demos/second/part13_plasmacube/graphics/Makefile
+++ b/demos/second/part13_plasmacube/graphics/Makefile
@@ -1,6 +1,6 @@
 include ../../../../Makefile.inc
 
-ZX02 = ~/research/6502_compression/zx02.git/build/zx02
+ZX02 = ~/research/6502_compression/zx02.git/build/zx02 -f
 PNG_TO_HGR = ../../../../utils/hgr-utils/png2hgr
 PNG2GR = ../../../../utils/gr-utils/png2gr
 
@@ -114,4 +114,4 @@ cube2_mask8.gr:	cube2_mask8.png
 ####
 
 clean:
-	rm -f *~
+	rm -f *~ *.zx02
diff --git a/demos/second/part13_plasmacube/graphics/cube2_mask1.png b/demos/second/part13_plasmacube/graphics/cube2_mask1.png
index 595bed09..569ae62e 100644
Binary files a/demos/second/part13_plasmacube/graphics/cube2_mask1.png and b/demos/second/part13_plasmacube/graphics/cube2_mask1.png differ
diff --git a/demos/second/part13_plasmacube/graphics/cube2_mask2.png b/demos/second/part13_plasmacube/graphics/cube2_mask2.png
index 2d49ae70..dcb8c6e5 100644
Binary files a/demos/second/part13_plasmacube/graphics/cube2_mask2.png and b/demos/second/part13_plasmacube/graphics/cube2_mask2.png differ
diff --git a/demos/second/part13_plasmacube/graphics/cube2_mask3.png b/demos/second/part13_plasmacube/graphics/cube2_mask3.png
index 128c8d41..c6334883 100644
Binary files a/demos/second/part13_plasmacube/graphics/cube2_mask3.png and b/demos/second/part13_plasmacube/graphics/cube2_mask3.png differ
diff --git a/demos/second/part13_plasmacube/graphics/cube2_mask4.png b/demos/second/part13_plasmacube/graphics/cube2_mask4.png
index 90baeb0c..8d78510c 100644
Binary files a/demos/second/part13_plasmacube/graphics/cube2_mask4.png and b/demos/second/part13_plasmacube/graphics/cube2_mask4.png differ
diff --git a/demos/second/part13_plasmacube/graphics/cube2_mask5.png b/demos/second/part13_plasmacube/graphics/cube2_mask5.png
index a9c89dd0..ae6d482d 100644
Binary files a/demos/second/part13_plasmacube/graphics/cube2_mask5.png and b/demos/second/part13_plasmacube/graphics/cube2_mask5.png differ
diff --git a/demos/second/part13_plasmacube/graphics/cube2_mask6.png b/demos/second/part13_plasmacube/graphics/cube2_mask6.png
index 322b31bc..f91a9f75 100644
Binary files a/demos/second/part13_plasmacube/graphics/cube2_mask6.png and b/demos/second/part13_plasmacube/graphics/cube2_mask6.png differ
diff --git a/demos/second/part13_plasmacube/graphics/cube2_mask7.png b/demos/second/part13_plasmacube/graphics/cube2_mask7.png
index 74f25fcd..99bf44e0 100644
Binary files a/demos/second/part13_plasmacube/graphics/cube2_mask7.png and b/demos/second/part13_plasmacube/graphics/cube2_mask7.png differ
diff --git a/demos/second/part13_plasmacube/graphics/cube2_mask8.png b/demos/second/part13_plasmacube/graphics/cube2_mask8.png
index 7ca72731..0aa989bd 100644
Binary files a/demos/second/part13_plasmacube/graphics/cube2_mask8.png and b/demos/second/part13_plasmacube/graphics/cube2_mask8.png differ
diff --git a/demos/second/part13_plasmacube/plasmacube.s b/demos/second/part13_plasmacube/plasmacube.s
index b48c3bca..ae701859 100644
--- a/demos/second/part13_plasmacube/plasmacube.s
+++ b/demos/second/part13_plasmacube/plasmacube.s
@@ -259,6 +259,7 @@ VBLANK:
 	lsr
 	lsr
 	lsr
+	lsr
 	and	#$f
 	tax
 	lda	mask_src_table,X
@@ -344,6 +345,16 @@ lores_colors_rgb: ; 256
 ; $00, $11, $33, $BB, $FF, $BB, $33, $11
 
 ; red
+.byte $11,$11,$11,$11,$11,$33,$33,$33
+.byte $33,$33,$bb,$bb,$bb,$bb,$bb,$ff
+.byte $ff,$ff,$ff,$ff,$ff,$bb,$bb,$bb
+.byte $bb,$bb,$33,$33,$33,$33,$33,$11
+.byte $11,$11,$11,$11,$33,$33,$33,$33
+.byte $bb,$bb,$bb,$bb,$bb,$ff,$ff,$ff
+.byte $ff,$ff,$ff,$bb,$bb,$bb,$bb,$bb
+.byte $33,$33,$33,$33,$33,$33,$11,$11
+.if 0
+
 .byte $00,$00,$00,$00,$00,$00,$00,$00
 .byte $11,$11,$11,$11,$11,$11,$11,$11
 .byte $33,$33,$33,$33,$33,$33,$33,$33
@@ -352,10 +363,24 @@ lores_colors_rgb: ; 256
 .byte $bb,$bb,$bb,$bb,$bb,$bb,$bb,$bb
 .byte $33,$33,$33,$33,$33,$33,$33,$33
 .byte $11,$11,$11,$11,$11,$11,$11,$11
+.endif
 
 ; $00, $22, $66, $77, $FF, $77, $66, $22
 
+; 22 66 77 ff 77 66
+
 ; blue
+
+.byte $22,$22,$22,$22,$22,$66,$66,$66
+.byte $66,$66,$77,$77,$77,$77,$77,$ff
+.byte $ff,$ff,$ff,$ff,$ff,$77,$77,$77
+.byte $77,$77,$66,$66,$66,$66,$66,$22
+.byte $22,$22,$22,$22,$66,$66,$66,$66
+.byte $77,$77,$77,$77,$77,$ff,$ff,$ff
+.byte $ff,$ff,$ff,$77,$77,$77,$77,$77
+.byte $66,$66,$66,$66,$66,$66,$22,$22
+
+.if 0
 .byte $00,$00,$00,$00,$00,$00,$00,$00
 .byte $22,$22,$22,$22,$22,$22,$22,$22
 .byte $66,$66,$66,$66,$66,$66,$66,$66
@@ -364,10 +389,21 @@ lores_colors_rgb: ; 256
 .byte $77,$77,$77,$77,$77,$77,$77,$77
 .byte $66,$66,$66,$66,$66,$66,$66,$66
 .byte $22,$22,$22,$22,$22,$22,$22,$22
+.endif
+
 
 ; $00, $44, $CC, $DD, $FF, $DD, $CC, $44
 
 ; green
+.byte $44,$44,$44,$44,$44,$cc,$cc,$cc
+.byte $cc,$cc,$dd,$dd,$dd,$dd,$dd,$ff
+.byte $ff,$ff,$ff,$ff,$ff,$dd,$dd,$dd
+.byte $dd,$dd,$cc,$cc,$cc,$cc,$cc,$44
+.byte $44,$44,$44,$44,$cc,$cc,$cc,$cc
+.byte $dd,$dd,$dd,$dd,$dd,$ff,$ff,$ff
+.byte $ff,$ff,$ff,$dd,$dd,$dd,$dd,$dd
+.byte $cc,$cc,$cc,$cc,$cc,$cc,$44,$44
+.if 0
 .byte $00,$00,$00,$00,$00,$00,$00,$00
 .byte $44,$44,$44,$44,$44,$44,$44,$44
 .byte $CC,$CC,$CC,$CC,$CC,$CC,$CC,$CC
@@ -376,7 +412,7 @@ lores_colors_rgb: ; 256
 .byte $DD,$DD,$DD,$DD,$DD,$DD,$DD,$DD
 .byte $CC,$CC,$CC,$CC,$CC,$CC,$CC,$CC
 .byte $44,$44,$44,$44,$44,$44,$44,$44
-
+.endif
 
 ; This table has relatively fine color bands
 .if 0