diff --git a/border/bigblur-crt.slangp b/border/bigblur-crt.slangp
index eefe6df..73c0974 100644
--- a/border/bigblur-crt.slangp
+++ b/border/bigblur-crt.slangp
@@ -6,11 +6,11 @@ scale0 = 4.0
 filter_linear0 = false
 alias0 = Reference
 
-shader1 = ../blurs/blur11fast-vertical.slang
+shader1 = ../blurs/blur11resize-vertical.slang
 scale_type1 = source
 scale1 = 0.5
 
-shader2 = ../blurs/blur11fast-horizontal.slang
+shader2 = ../blurs/blur11resize-horizontal.slang
 scale_type2 = source
 scale2 = 0.5
 
diff --git a/border/bigblur.slangp b/border/bigblur.slangp
index f8bb80e..6eb52fb 100644
--- a/border/bigblur.slangp
+++ b/border/bigblur.slangp
@@ -3,11 +3,11 @@ shaders = 4
 shader0 = ../misc/image-adjustment.slang
 alias0 = Reference
 
-shader1 = ../blurs/blur11fast-vertical.slang
+shader1 = ../blurs/blur9fast-vertical.slang
 scale_type1 = source
 scale1 = 1.0
 
-shader2 = ../blurs/blur11fast-horizontal.slang
+shader2 = ../blurs/blur9fast-horizontal.slang
 scale_type2 = source
 scale2 = 1.0
 
diff --git a/border/shaders/bigblur.slang b/border/shaders/bigblur.slang
index ded6569..a8cf717 100644
--- a/border/shaders/bigblur.slang
+++ b/border/shaders/bigblur.slang
@@ -15,6 +15,10 @@ layout(push_constant) uniform Push
 	float in_res_x;
 	float in_res_y;
 	float border_on_top;
+	float OS_MASK_TOP;
+	float OS_MASK_BOTTOM;
+	float OS_MASK_LEFT;
+	float OS_MASK_RIGHT;
 } params;
 
 #pragma parameter box_scale "Image Scale" 4.0 1.0 10.0 1.0
@@ -23,6 +27,10 @@ layout(push_constant) uniform Push
 #pragma parameter in_res_x "Viewport Size X" 320.0 100.0 600.0 1.0
 #pragma parameter in_res_y "Viewport Size Y" 240.0 64.0 512.0 1.0
 #pragma parameter border_on_top "Show Viewport" 1.0 0.0 1.0 1.0
+#pragma parameter OS_MASK_TOP "OS Mask Top" 0.0 0.0 1.0 0.01
+#pragma parameter OS_MASK_BOTTOM "OS Mask Bottom" 0.0 0.0 1.0 0.01
+#pragma parameter OS_MASK_LEFT "OS Mask Left" 0.0 0.0 1.0 0.01
+#pragma parameter OS_MASK_RIGHT "OS Mask Right" 0.0 0.0 1.0 0.01
 
 layout(std140, set = 0, binding = 0) uniform UBO
 {
@@ -45,7 +53,7 @@ void main()
    screen_coord = middle + diff * scale;
    middle = vec2(0.4999, 0.4999);
    vec2 dist = vTexCoord - middle;
-   vTexCoord = TexCoord * 0.25 * vec2(1.25, 1.0);
+   vTexCoord = TexCoord * 0.25 * vec2(1.35, 1.0);
 }
 
 #pragma stage fragment
@@ -58,8 +66,8 @@ layout(set = 0, binding = 3) uniform sampler2D Reference;
 void main()
 {
 vec4 screen = texture(Reference, screen_coord); //the main video screen
-vec4 background = texture(Source, vTexCoord + vec2(0.5)); //put your background function's output here
-if ( screen_coord.x < 0.9999 && screen_coord.x > 0.0001 && screen_coord.y < 0.9999 && screen_coord.y > 0.0001 && params.border_on_top > 0.5 )
+vec4 background = texture(Source, vTexCoord + vec2(0.33, 0.40)); //put your background function's output here
+if ( screen_coord.x < 0.9999 - params.OS_MASK_RIGHT && screen_coord.x > 0.0001 + params.OS_MASK_LEFT && screen_coord.y < 0.9999 - params.OS_MASK_BOTTOM && screen_coord.y > 0.0001 + params.OS_MASK_TOP && params.border_on_top > 0.5 )
 background.a *= 0.0;
    FragColor = vec4(mix(screen, background, background.a));
 }
\ No newline at end of file
diff --git a/presets/bigblur-lottes-multipass.slangp b/presets/bigblur-lottes-multipass.slangp
new file mode 100644
index 0000000..59d3b1e
--- /dev/null
+++ b/presets/bigblur-lottes-multipass.slangp
@@ -0,0 +1,69 @@
+shaders = 13
+
+shader0 = ../crt/shaders/crt-lottes-multipass/linearize.slang
+srgb_framebuffer0 = true
+alias0 = "REFERENCE"
+
+shader1 = ../crt/shaders/crt-lottes-multipass/horz3minus1.slang
+srgb_framebuffer1 = true
+scale_type1 = source
+filter_linear1 = true
+alias1 = horz3minus1
+
+shader2 = ../crt/shaders/crt-lottes-multipass/horz3plus1.slang
+srgb_framebuffer2 = true
+scale_type2 = source
+filter_linear2 = true
+alias2 = horz3plus1
+
+shader3 = ../crt/shaders/crt-lottes-multipass/horz5minus2.slang
+srgb_framebuffer3 = true
+scale_type3 = source
+filter_linear3 = true
+alias3 = horz5minus2
+
+shader4 = ../crt/shaders/crt-lottes-multipass/horz5.slang
+srgb_framebuffer4 = true
+scale_type4 = source
+filter_linear4 = true
+alias4 = horz5
+
+shader5 = ../crt/shaders/crt-lottes-multipass/horz5plus2.slang
+srgb_framebuffer5 = true
+scale_type5 = source
+filter_linear5 = true
+alias5 = horz5plus2
+
+shader6 = ../crt/shaders/crt-lottes-multipass/horz7minus1.slang
+srgb_framebuffer6 = true
+scale_type6 = source
+filter_linear6 = true
+alias6 = horz7minus1
+
+shader7 = ../crt/shaders/crt-lottes-multipass/horz7.slang
+srgb_framebuffer7 = true
+scale_type7 = source
+filter_linear7 = true
+alias7 = horz7
+
+shader8 = ../crt/shaders/crt-lottes-multipass/horz7plus1.slang
+srgb_framebuffer8 = true
+scale_type8 = source
+filter_linear8 = true
+alias8 = horz7plus1
+
+shader9 = ../crt/shaders/crt-lottes-multipass/crt-lottes-multipass.slang
+scale_type9 = source
+scale9 = 4.0
+filter_linear9 = false
+alias9 = Reference
+
+shader10 = ../blurs/blur11resize-vertical.slang
+scale_type10 = source
+scale10 = 0.5
+
+shader11 = ../blurs/blur11resize-horizontal.slang
+scale_type11 = source
+scale11 = 0.5
+
+shader12 = ../border/shaders/bigblur.slang
\ No newline at end of file