diff --git a/xsal/2xsal-level2 - CRT.slangp b/xsal/2xsal-level2 - CRT.slangp
new file mode 100644
index 0000000..42aa5ec
--- /dev/null
+++ b/xsal/2xsal-level2 - CRT.slangp	
@@ -0,0 +1,12 @@
+shaders = 2
+
+shader0 = shaders/2xsal-level2.slang
+filter_linear0 = false
+scale_type0 = source
+scale_x0 = 2.0
+scale_y0 = 2.0
+
+shader1 = ../crt/shaders/dotmask.slang
+filter_linear1 = true
+scale_type1 = viewport
+scale1 = 1.0
diff --git a/xsal/2xsal-level2.slangp b/xsal/2xsal-level2.slangp
new file mode 100644
index 0000000..be03efe
--- /dev/null
+++ b/xsal/2xsal-level2.slangp
@@ -0,0 +1,11 @@
+shaders = 2
+
+shader0 = shaders/2xsal-level2.slang
+filter_linear0 = false
+scale_type0 = source
+scale_x0 = 2.0
+scale_y0 = 2.0
+
+shader1 = ../stock.slang
+filter_linear1 = true
+scale_type_1 = source
diff --git a/xsal/2xsal.slangp b/xsal/2xsal.slangp
new file mode 100644
index 0000000..d4783ba
--- /dev/null
+++ b/xsal/2xsal.slangp
@@ -0,0 +1,11 @@
+shaders = 2
+
+shader0 = shaders/2xsal.slang
+filter_linear0 = false
+scale_type0 = source
+scale_x0 = 2.0
+scale_y0 = 2.0
+
+shader1 = ../stock.slang
+filter_linear1 = true
+scale_type_1 = source
diff --git a/xsal/4xsal-level2 - CRT.slangp b/xsal/4xsal-level2 - CRT.slangp
new file mode 100644
index 0000000..16efec5
--- /dev/null
+++ b/xsal/4xsal-level2 - CRT.slangp	
@@ -0,0 +1,18 @@
+shaders = 3
+
+shader0 = shaders/2xsal-level2.slang
+filter_linear0 = false
+scale_type0 = source
+scale_x0 = 2.0
+scale_y0 = 2.0
+
+shader1 = shaders/2xsal.slang
+filter_linear1 = false
+scale_type1 = source
+scale_x1 = 2.0
+scale_y1 = 2.0
+
+shader2 = ../crt/shaders/dotmask.slang
+filter_linear2 = true
+scale_type2 = viewport
+scale2 = 1.0
diff --git a/xsal/4xsal-level2 - DDT.slangp b/xsal/4xsal-level2 - DDT.slangp
new file mode 100644
index 0000000..f675b0b
--- /dev/null
+++ b/xsal/4xsal-level2 - DDT.slangp	
@@ -0,0 +1,13 @@
+shaders = 2
+
+shader0 = shaders/2xsal-level2.slang
+filter_linear0 = false
+scale_type0 = source
+scale_x0 = 2.0
+scale_y0 = 2.0
+
+shader1 = ../ddt/shaders/ddt-extended.slang
+filter_linear1 = false
+scale_type1 = viewport
+scale1 = 1.0 
+
diff --git a/xsal/4xsal-level2.slangp b/xsal/4xsal-level2.slangp
new file mode 100644
index 0000000..ca8ec5a
--- /dev/null
+++ b/xsal/4xsal-level2.slangp
@@ -0,0 +1,17 @@
+shaders = 3
+
+shader0 = shaders/2xsal-level2.slang
+filter_linear0 = false
+scale_type0 = source
+scale_x0 = 2.0
+scale_y0 = 2.0
+
+shader1 = shaders/2xsal.slang
+filter_linear1 = false
+scale_type1 = source
+scale_x1 = 2.0
+scale_y1 = 2.0
+
+shader2 = ../stock.slang
+filter_linear2 = true
+scale_type2 = source 
diff --git a/xsal/shaders/2xsal-level2.slang b/xsal/shaders/2xsal-level2.slang
new file mode 100644
index 0000000..7ccf01d
--- /dev/null
+++ b/xsal/shaders/2xsal-level2.slang
@@ -0,0 +1,95 @@
+#version 450
+
+/*
+    Copyright (C) 2016 guest(r) - guest.r@gmail.com
+
+    This program is free software; you can redistribute it and/or
+    modify it under the terms of the GNU General Public License
+    as published by the Free Software Foundation; either version 2
+    of the License, or (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program; if not, write to the Free Software
+    Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
+*/
+
+layout(push_constant) uniform Push
+{
+    vec4 OutputSize;
+    vec4 OriginalSize;
+    vec4 SourceSize;
+} params;
+
+layout(std140, set = 0, binding = 0) uniform UBO
+{
+    mat4 MVP;
+} global;
+
+#pragma stage vertex
+layout(location = 0) in  vec4 Position;
+layout(location = 1) in  vec2 TexCoord;
+layout(location = 0) out vec2 vTexCoord;
+
+/* Default Vertex shader */
+void main()
+{
+    gl_Position = global.MVP * Position;
+    vTexCoord   = TexCoord;
+}
+
+#pragma stage fragment
+layout(location = 0) in  vec2 vTexCoord;
+layout(location = 1) in  vec2 FragCoord;
+layout(location = 0) out vec4 FragColor;
+layout(set = 0, binding = 2) uniform sampler2D Source;
+
+void main()
+{
+    float dx = 0.25 * params.SourceSize.z;
+    float dy = 0.25 * params.SourceSize.w;
+    vec3  dt = vec3(1.0, 1.0, 1.0);
+
+    vec4 yx = vec4(  dx,   dy,      -dx,   -dy);
+    vec4 xh = vec4(3*dx,   dy,    -3*dx,   -dy);
+    vec4 yv = vec4(  dx, 3*dy,      -dx, -3*dy);
+
+    vec3 c11 = texture(Source, vTexCoord        ).xyz;  
+    vec3 s00 = texture(Source, vTexCoord + yx.zw).xyz;
+    vec3 s20 = texture(Source, vTexCoord + yx.xw).xyz;
+    vec3 s22 = texture(Source, vTexCoord + yx.xy).xyz;
+    vec3 s02 = texture(Source, vTexCoord + yx.zy).xyz;
+    vec3 h00 = texture(Source, vTexCoord + xh.zw).xyz;
+    vec3 h20 = texture(Source, vTexCoord + xh.xw).xyz;
+    vec3 h22 = texture(Source, vTexCoord + xh.xy).xyz;
+    vec3 h02 = texture(Source, vTexCoord + xh.zy).xyz;
+    vec3 v00 = texture(Source, vTexCoord + yv.zw).xyz;
+    vec3 v20 = texture(Source, vTexCoord + yv.xw).xyz;
+    vec3 v22 = texture(Source, vTexCoord + yv.xy).xyz;
+    vec3 v02 = texture(Source, vTexCoord + yv.zy).xyz;
+
+    float m1 = 1.0/(dot(abs(s00 - s22), dt) + 0.00001);
+    float m2 = 1.0/(dot(abs(s02 - s20), dt) + 0.00001);   
+    float h1 = 1.0/(dot(abs(s00 - h22), dt) + 0.00001);
+    float h2 = 1.0/(dot(abs(s02 - h20), dt) + 0.00001);
+    float h3 = 1.0/(dot(abs(h00 - s22), dt) + 0.00001);
+    float h4 = 1.0/(dot(abs(h02 - s20), dt) + 0.00001);
+    float v1 = 1.0/(dot(abs(s00 - v22), dt) + 0.00001);
+    float v2 = 1.0/(dot(abs(s02 - v20), dt) + 0.00001);
+    float v3 = 1.0/(dot(abs(v00 - s22), dt) + 0.00001);
+    float v4 = 1.0/(dot(abs(v02 - s20), dt) + 0.00001);
+
+    vec3 t1 = 0.5*(m1*(s00 + s22) + m2*(s02 + s20))/(m1 + m2);
+    vec3 t2 = 0.5*(h1*(s00 + h22) + h2*(s02 + h20) + h3*(h00+s22) + h4*(h02 + s20))/(h1 + h2 + h3 + h4);
+    vec3 t3 = 0.5*(v1*(s00 + v22) + v2*(s02 + v20) + v3*(v00+s22) + v4*(v02 + s20))/(v1 + v2 + v3 + v4);
+
+    float k1 = 1.0/(dot(abs(t1 - c11),dt) + 0.00001);
+    float k2 = 1.0/(dot(abs(t2 - c11),dt) + 0.00001);
+    float k3 = 1.0/(dot(abs(t3 - c11),dt) + 0.00001);   
+
+    FragColor = vec4((k1*t1 + k2*t2 + k3*t3)/(k1 + k2 + k3), 1.0);
+}
diff --git a/xsal/shaders/2xsal.slang b/xsal/shaders/2xsal.slang
new file mode 100644
index 0000000..32e31ab
--- /dev/null
+++ b/xsal/shaders/2xsal.slang
@@ -0,0 +1,79 @@
+#version 450
+
+/*
+    Copyright (C) 2007 guest(r) - guest.r@gmail.com
+
+    This program is free software; you can redistribute it and/or
+    modify it under the terms of the GNU General Public License
+    as published by the Free Software Foundation; either version 2
+    of the License, or (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program; if not, write to the Free Software
+    Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
+*/
+
+layout(push_constant) uniform Push
+{
+    vec4 OutputSize;
+    vec4 OriginalSize;
+    vec4 SourceSize;
+} params;
+
+layout(std140, set = 0, binding = 0) uniform UBO
+{
+    mat4 MVP;
+} global;
+
+#pragma stage vertex
+layout(location = 0) in  vec4 Position;
+layout(location = 1) in  vec2 TexCoord;
+layout(location = 0) out vec2 vTexCoord;
+
+/* Default Vertex shader */
+void main()
+{
+    gl_Position = global.MVP * Position;
+    vTexCoord   = TexCoord;
+}
+
+#pragma stage fragment
+layout(location = 0) in  vec2 vTexCoord;
+layout(location = 1) in  vec2 FragCoord;
+layout(location = 0) out vec4 FragColor;
+layout(set = 0, binding = 2) uniform sampler2D Source;
+
+struct deltas
+{
+   vec2 UL, UR, DL, DR;
+};
+
+void main()
+{
+    vec2  texsize = params.SourceSize.xy;
+    float dx      = pow(texsize.x, -1.0) * 0.25;
+    float dy      = pow(texsize.y, -1.0) * 0.25;
+    vec3  dt      = vec3(1.0, 1.0, 1.0);
+
+    deltas VAR = { 
+        vTexCoord + vec2(-dx, -dy),
+        vTexCoord + vec2( dx, -dy),
+        vTexCoord + vec2(-dx,  dy),
+        vTexCoord + vec2( dx,  dy)
+    };
+
+    vec3 c00 = texture(Source, VAR.UL).xyz;
+    vec3 c20 = texture(Source, VAR.UR).xyz;
+    vec3 c02 = texture(Source, VAR.DL).xyz;
+    vec3 c22 = texture(Source, VAR.DR).xyz;
+
+    float m1 = dot(abs(c00 - c22), dt) + 0.001;
+    float m2 = dot(abs(c02 - c20), dt) + 0.001;
+
+    FragColor = vec4((m1*(c02 + c20) + m2*(c22 + c00)) / (2.0*(m1 + m2)), 1.0);
+}