diff --git a/amiga/gui.c b/amiga/gui.c
index 4d5e98208..39ea08dc8 100755
--- a/amiga/gui.c
+++ b/amiga/gui.c
@@ -540,8 +540,11 @@ void gui_init2(int argc, char** argv)
 		SetDrMd(&glob.rp,BGBACKFILL);
 
 		glob.layerinfo = NewLayerInfo();
+
 		glob.rp.Layer = CreateUpfrontLayer(glob.layerinfo,glob.bm,0,0,
-							scrn->Width-1,scrn->Width-1,0,NULL);
+							scrn->Width-1,scrn->Width-1,LAYERSIMPLE,NULL);
+
+		InstallLayerHook(glob.rp.Layer,LAYERS_NOBACKFILL);
 
 		glob.areabuf = AllocVec(100,MEMF_PRIVATE | MEMF_CLEAR);
 		glob.rp.AreaInfo = AllocVec(sizeof(struct AreaInfo),MEMF_PRIVATE | MEMF_CLEAR);
@@ -1672,6 +1675,7 @@ struct gui_window *gui_create_browser_window(struct browser_window *bw,
            	WA_SizeGadget, TRUE,
 			WA_CustomScreen,scrn,
 			WA_ReportMouse,TRUE,
+			WA_SimpleRefresh,TRUE,
            	WA_IDCMP,IDCMP_MENUPICK | IDCMP_MOUSEMOVE | IDCMP_MOUSEBUTTONS |
 				 IDCMP_NEWSIZE | IDCMP_RAWKEY | IDCMP_GADGETUP |
 				IDCMP_IDCMPUPDATE | IDCMP_INTUITICKS | IDCMP_EXTENDEDMOUSE,
@@ -1752,6 +1756,7 @@ struct gui_window *gui_create_browser_window(struct browser_window *bw,
 					WA_Height,curh,
 					WA_CustomScreen,scrn,
 					WA_ReportMouse,TRUE,
+					WA_SimpleRefresh,TRUE,
         		   	WA_IDCMP,IDCMP_MENUPICK | IDCMP_MOUSEMOVE |
 								IDCMP_MOUSEBUTTONS | IDCMP_NEWSIZE |
 								IDCMP_RAWKEY |
@@ -2242,7 +2247,7 @@ void ami_do_redraw(struct gui_window_2 *g,bool scroll)
 	if (c->locked) return;
 
 	current_redraw_browser = g->bw;
-	currp = &glob.rp;
+//	currp = &glob.rp;
 
 	width=bbox->Width;
 	height=bbox->Height;
diff --git a/amiga/plotters.c b/amiga/plotters.c
index 1a746d202..ce1184703 100755
--- a/amiga/plotters.c
+++ b/amiga/plotters.c
@@ -29,6 +29,7 @@
 #include <proto/layers.h>
 #include "amiga/options.h"
 #include <graphics/blitattr.h>
+#include <graphics/composite.h>
 #include "utils/log.h"
 #include <math.h>
 #include <assert.h>
@@ -250,6 +251,7 @@ bool ami_clip(int x0, int y0, int x1, int y1)
 
 	if(currp->Layer)
 	{
+
 		reg = InstallClipRegion(currp->Layer,NULL);
 
 		if(!reg)
@@ -364,7 +366,26 @@ bool ami_bitmap(int x, int y, int width, int height,
 
 	if(!tbm) return true;
 
-	BltBitMapTags(BLITA_Width,width,
+	if(GfxBase->lib_Version >= 53) // AutoDoc says v52, but this function isn't in OS4.0, so checking for v53 (OS4.1)
+	{
+		uint32 comptype = COMPOSITE_Src;
+		if(!bitmap->opaque) comptype = COMPOSITE_Src_Over_Dest;
+
+		CompositeTags(comptype,tbm,currp->BitMap,
+					COMPTAG_Flags,COMPFLAG_IgnoreDestAlpha,
+					COMPTAG_DestX,glob.rect.MinX,
+					COMPTAG_DestY,glob.rect.MinY,
+					COMPTAG_DestWidth,glob.rect.MaxX - glob.rect.MinX,
+					COMPTAG_DestHeight,glob.rect.MaxY - glob.rect.MinY,
+					COMPTAG_SrcWidth,width,
+					COMPTAG_SrcHeight,height,
+					COMPTAG_OffsetX,x,
+					COMPTAG_OffsetY,y,
+					TAG_DONE);
+	}
+	else
+	{
+		BltBitMapTags(BLITA_Width,width,
 						BLITA_Height,height,
 						BLITA_Source,tbm,
 						BLITA_Dest,currp,
@@ -372,8 +393,10 @@ bool ami_bitmap(int x, int y, int width, int height,
 						BLITA_DestY,y,
 						BLITA_SrcType,BLITT_BITMAP,
 						BLITA_DestType,BLITT_RASTPORT,
+//						BLITA_Mask,0xFF,
 						BLITA_UseSrcAlpha,!bitmap->opaque,
 						TAG_DONE);
+	}
 
 	if(tbm != bitmap->nativebm)
 	{
@@ -413,7 +436,26 @@ bool ami_bitmap_tile(int x, int y, int width, int height,
 
 			assert(tbm);
 
-			BltBitMapTags(BLITA_Width,width,
+			if(GfxBase->lib_Version >= 53) // AutoDoc says v52, but this function isn't in OS4.0, so checking for v53 (OS4.1)
+			{
+				uint32 comptype = COMPOSITE_Src;
+				if(!bitmap->opaque) comptype = COMPOSITE_Src_Over_Dest;
+
+		CompositeTags(comptype,tbm,currp->BitMap,
+					COMPTAG_Flags,COMPFLAG_IgnoreDestAlpha,
+					COMPTAG_DestX,glob.rect.MinX,
+					COMPTAG_DestY,glob.rect.MinY,
+					COMPTAG_DestWidth,glob.rect.MaxX - glob.rect.MinX,
+					COMPTAG_DestHeight,glob.rect.MaxY - glob.rect.MinY,
+					COMPTAG_SrcWidth,width,
+					COMPTAG_SrcHeight,height,
+					COMPTAG_OffsetX,xf,
+					COMPTAG_OffsetY,yf,
+					TAG_DONE);
+			}
+			else
+			{
+				BltBitMapTags(BLITA_Width,width,
 						BLITA_Height,height,
 						BLITA_Source,tbm,
 						BLITA_Dest,currp,
@@ -421,9 +463,10 @@ bool ami_bitmap_tile(int x, int y, int width, int height,
 						BLITA_DestY,yf,
 						BLITA_SrcType,BLITT_BITMAP,
 						BLITA_DestType,BLITT_RASTPORT,
+//						BLITA_Mask,0xFF,
 						BLITA_UseSrcAlpha,!bitmap->opaque,
 						TAG_DONE);
-
+			}
 			if (!repeat_y)
 				break;
 		}