diff --git a/tools/imagecon/Makefile b/tools/imagecon/Makefile
index aedadec..5eee97f 100644
--- a/tools/imagecon/Makefile
+++ b/tools/imagecon/Makefile
@@ -26,6 +26,10 @@ HAM_IMAGE=../../assets/gigi.png
 HAM_BASE=out/ham
 REFERENCE_HAM_BASE=reference/ham
 
+DITHERED_HAM_IMAGE=../../assets/gigi.png
+DITHERED_HAM_BASE=out/dithered_ham
+REFERENCE_DITHERED_HAM_BASE=reference/dithered_ham
+
 $(IMAGECON): out bin $(OBJS) 
 	gcc $(OBJS) -o $(IMAGECON) $(LIBS)
 
@@ -63,7 +67,10 @@ $(EHB_BASE).bin: $(EHB_IMAGE)
 $(HAM_BASE).bin: $(HAM_IMAGE)
 	$(IMAGECON) --input $(HAM_IMAGE) --output $(HAM_BASE) --output-bitplanes --ham --output-palette-asm
 
-test: $(IMAGECON) $(OUTPUT_BASE).bin $(SHARED_PALETTE) $(USED_PALETTE) $(EHB_BASE).bin $(HAM_BASE).bin
+$(DITHERED_HAM_BASE).bin: $(DITHERED_HAM_IMAGE)
+	$(IMAGECON) --input $(DITHERED_HAM_IMAGE) --output $(DITHERED_HAM_BASE) --dither --output-bitplanes --ham --output-palette-asm
+
+test: $(IMAGECON) $(OUTPUT_BASE).bin $(SHARED_PALETTE) $(USED_PALETTE) $(EHB_BASE).bin $(HAM_BASE).bin $(DITHERED_HAM_BASE).bin
 	diff $(OUTPUT_BASE).bin $(REFERENCE_BASE).bin	
 	diff $(OUTPUT_BASE)-copper-list.s $(REFERENCE_BASE)-copper-list.s
 	diff $(OUTPUT_BASE)-palette.s $(REFERENCE_BASE)-palette.s
@@ -76,6 +83,8 @@ test: $(IMAGECON) $(OUTPUT_BASE).bin $(SHARED_PALETTE) $(USED_PALETTE) $(EHB_BAS
 	diff $(EHB_BASE)-copper-list.s $(REFERENCE_EHB_BASE)-copper-list.s
 	diff $(HAM_BASE)-ham.bin $(REFERENCE_HAM_BASE)-ham.bin
 	diff $(HAM_BASE)-palette.s $(REFERENCE_HAM_BASE)-palette.s
+	diff $(DITHERED_HAM_BASE)-ham.bin $(REFERENCE_DITHERED_HAM_BASE)-ham.bin
+	diff $(DITHERED_HAM_BASE)-palette.s $(REFERENCE_DITHERED_HAM_BASE)-palette.s
 
 	@echo "______  ___   _____ _____ ___________  "
 	@echo "| ___ \/ _ \ /  ___/  ___|  ___|  _  \ "
diff --git a/tools/imagecon/reference/dithered_ham-ham.bin b/tools/imagecon/reference/dithered_ham-ham.bin
new file mode 100644
index 0000000..4d9291a
Binary files /dev/null and b/tools/imagecon/reference/dithered_ham-ham.bin differ
diff --git a/tools/imagecon/reference/dithered_ham-palette.s b/tools/imagecon/reference/dithered_ham-palette.s
new file mode 100644
index 0000000..42197ea
--- /dev/null
+++ b/tools/imagecon/reference/dithered_ham-palette.s
@@ -0,0 +1,35 @@
+	movem.l d0-a6,-(sp)
+	lea CUSTOM,a6
+	lea COLOR00(a6),a0
+	move.w #$421,(a0)
+	lea COLOR01(a6),a0
+	move.w #$631,(a0)
+	lea COLOR02(a6),a0
+	move.w #$852,(a0)
+	lea COLOR03(a6),a0
+	move.w #$210,(a0)
+	lea COLOR04(a6),a0
+	move.w #$79a,(a0)
+	lea COLOR05(a6),a0
+	move.w #$ea6,(a0)
+	lea COLOR06(a6),a0
+	move.w #$c84,(a0)
+	lea COLOR07(a6),a0
+	move.w #$a63,(a0)
+	lea COLOR08(a6),a0
+	move.w #$552,(a0)
+	lea COLOR09(a6),a0
+	move.w #$688,(a0)
+	lea COLOR10(a6),a0
+	move.w #$765,(a0)
+	lea COLOR11(a6),a0
+	move.w #$455,(a0)
+	lea COLOR12(a6),a0
+	move.w #$fb7,(a0)
+	lea COLOR13(a6),a0
+	move.w #$9aa,(a0)
+	lea COLOR14(a6),a0
+	move.w #$997,(a0)
+	lea COLOR15(a6),a0
+	move.w #$edb,(a0)
+	movem.l (sp)+,d0-a6