diff --git a/games/ootw/ootw_c3/graphics/l3_vent/Makefile b/games/ootw/ootw_c3/graphics/l3_vent/Makefile
index e331e46a..c938ca44 100644
--- a/games/ootw/ootw_c3/graphics/l3_vent/Makefile
+++ b/games/ootw/ootw_c3/graphics/l3_vent/Makefile
@@ -1,18 +1,25 @@
-include ../../../Makefile.inc
+include ../../../../../Makefile.inc
 
-PNG2RLE = ../../../gr-utils/png2rle
-PNG2LZ4 = ../../../gr-utils/png2lz4
+PNG2GR = ../../../../../utils/gr-utils/png2gr
+LZSA = ~/research/lzsa/lzsa/lzsa
 
 all:	ootw_c3_vent.inc
 
 #####
 
-ootw_c3_vent.inc:	$(PNG2RLE) \
-	vent.png
-	$(PNG2RLE) asm vent.png vent_rle > ootw_c3_vent.inc
+ootw_c3_vent.inc:	vent.lzsa
+	echo "vent_lzsa: .incbin \"vent.lzsa\"" > ootw_c3_vent.inc
+
+#####
+
+%.gr:	%.png
+	$(PNG2GR) $< $@
+
+%.lzsa:	%.gr
+	$(LZSA) -r -f2 $< $@
 
 #####
 
 clean:		
-		rm -f *~ *.o *.lst *.lzz *.inc
+		rm -f *~ *.o *.lst *.lzsa *.gr
 
diff --git a/games/ootw/ootw_c3/graphics/l3_vent/ootw_c3_vent.inc b/games/ootw/ootw_c3/graphics/l3_vent/ootw_c3_vent.inc
deleted file mode 100644
index 24671adc..00000000
--- a/games/ootw/ootw_c3/graphics/l3_vent/ootw_c3_vent.inc
+++ /dev/null
@@ -1,36 +0,0 @@
-vent_rle:	.byte $28 ; ysize=48
-	.byte $00, $AC,$20, $70, $A5,$20, $22, $00,$00, $22
-	.byte $A0,$11,$20, $00, $22, $A0,$25,$00, $22, $00, $22
-	.byte $00,$00, $A0,$21,$20, $00,$00, $22, $00, $22, $00,$00
-	.byte $22, $A0,$1F,$00, $22, $00,$00, $22, $00, $22
-	.byte $00,$00, $22, $A0,$1F,$00, $22, $00,$00, $22, $00
-	.byte $22, $00,$00, $A3,$02, $22, $20,$20, $70, $20,$20
-	.byte $A0,$17,$00, $22, $00,$00, $22, $00, $22, $AA,$00
-	.byte $A5,$02, $22, $A5,$20, $A6,$00, $88,$88, $8F, $FF
-	.byte $A3,$00, $22, $00,$00, $22, $00, $A4,$02, $22
-	.byte $A5,$20, $AB,$00, $22, $A6,$00, $2B, $00, $0B
-	.byte $22, $A3,$00, $22, $00,$00, $22, $AA,$00, $A5,$02
-	.byte $22, $A4,$20, $00,$00, $22, $A6,$00, $22, $00,$00
-	.byte $22, $A3,$00, $22, $00,$00, $22, $A0,$13,$00, $22
-	.byte $00,$00, $22, $A6,$00, $22, $00,$00, $22, $A3,$00
-	.byte $22, $00,$00, $22, $A4,$00, $AE,$20, $70, $22
-	.byte $00,$00, $22, $70, $A5,$20, $22, $00,$00, $22
-	.byte $A3,$00, $22, $00,$00, $22, $A4,$00, $22, $A0,$1B,$00
-	.byte $22, $A3,$00, $22, $A7,$00, $22, $00,$00, $A0,$17,$20
-	.byte $00,$00, $22, $A3,$00, $22, $A7,$00, $22, $00,$00
-	.byte $22, $A0,$15,$00, $22, $00,$00, $22, $A3,$00, $22
-	.byte $00,$00, $22, $A4,$00, $22, $00,$00, $22, $A0,$15,$00
-	.byte $22, $00,$00, $22, $A3,$00, $22, $00,$00, $22
-	.byte $A4,$20, $22, $00,$00, $22, $A7,$00, $AE,$20, $22
-	.byte $00,$00, $22, $A3,$20, $22, $00,$00, $22, $A7,$00
-	.byte $22, $A7,$00, $22, $A0,$17,$00, $22, $A5,$20, $00,$00
-	.byte $22, $A7,$00, $22, $00,$00, $A0,$13,$20, $00,$00, $22
-	.byte $A4,$00, $22, $00,$00, $22, $A7,$00, $22, $00,$00
-	.byte $22, $A0,$11,$00, $22, $00,$00, $22, $A4,$00, $22
-	.byte $00,$00, $22, $A7,$00, $22, $00,$00, $22, $A0,$11,$00
-	.byte $22, $00,$00, $22, $A4,$00, $22, $00,$00, $22
-	.byte $A7,$20, $22, $00,$00, $22, $A0,$11,$20, $22, $00,$00
-	.byte $22, $A4,$00, $22, $A0,$22,$00, $22, $A4,$00, $22
-	.byte $A0,$10,$20, $00,$00, $A0,$10,$20, $22, $A0,$14,$00, $22, $00,$00
-	.byte $22, $A0,$10,$00
-	.byte $A1
diff --git a/games/ootw/ootw_c3/ootw_c3.s b/games/ootw/ootw_c3/ootw_c3.s
index 93d7d203..05dbb7df 100644
--- a/games/ootw/ootw_c3/ootw_c3.s
+++ b/games/ootw/ootw_c3/ootw_c3.s
@@ -82,7 +82,7 @@ end_message:
 .include "ootw_c3_vent.s"
 .include "../text_print.s"
 .include "../gr_pageflip.s"
-.include "../gr_unrle.s"
+.include "../decompress_fast_v2.s"
 .include "../gr_fast_clear.s"
 .include "../gr_copy.s"
 .include "../gr_putsprite.s"
diff --git a/games/ootw/ootw_c3/ootw_c3_vent.s b/games/ootw/ootw_c3/ootw_c3_vent.s
index ff20a812..62876d6a 100644
--- a/games/ootw/ootw_c3/ootw_c3_vent.s
+++ b/games/ootw/ootw_c3/ootw_c3_vent.s
@@ -54,12 +54,12 @@ ootw_vent:
 
 	;============================
 	; load background
-	lda	#>(vent_rle)
-	sta	GBASH
-	lda	#<(vent_rle)
-	sta	GBASL
+	lda	#<(vent_lzsa)
+	sta	getsrc_smc+1    ; LZSA_SRC_LO
+	lda	#>(vent_lzsa)
+	sta	getsrc_smc+2    ; LZSA_SRC_HI
 	lda	#$c				; load to page $c00
-	jsr	load_rle_gr			; tail call
+	jsr	decompress_lzsa2_fast		; tail call