diff --git a/addons/procedural_material/graph_edit.tscn b/addons/procedural_material/graph_edit.tscn
new file mode 100644
index 0000000..ef1a3d2
--- /dev/null
+++ b/addons/procedural_material/graph_edit.tscn
@@ -0,0 +1,397 @@
+[gd_scene load_steps=7 format=2]
+
+[ext_resource path="res://addons/procedural_material/graph_edit.gd" type="Script" id=1]
+[ext_resource path="res://addons/procedural_material/nodes/material.tscn" type="PackedScene" id=2]
+[ext_resource path="res://addons/procedural_material/nodes/material.gd" type="Script" id=3]
+
+[sub_resource type="Theme" id=1]
+
+
+[sub_resource type="Shader" id=2]
+
+code = "shader_type canvas_item;
+
+float rand(vec2 x) {
+    return fract(sin(dot(x, vec2(13.9898, 8.141))) * 43758.5453);
+}
+
+vec2 rand2(vec2 x) {
+    return fract(sin(vec2(dot(x, vec2(13.9898, 8.141)),
+						  dot(x, vec2(3.4562, 17.398)))) * 43758.5453);
+}
+
+vec3 rand3(vec2 x) {
+    return fract(sin(vec3(dot(x, vec2(13.9898, 8.141)),
+                          dot(x, vec2(3.4562, 17.398)),
+                          dot(x, vec2(13.254, 5.867)))) * 43758.5453);
+}
+
+float wave_sin(float x) {
+	return 0.5-0.5*cos(3.1415928*2.0*x);
+}
+
+float wave_saw(float x) {
+	x = fract(x);
+	return min(2.0*x, 2.0-2.0*x);
+}
+
+float wave_square(float x) {
+	return (fract(x) < 0.5) ? 0.0 : 1.0;
+}
+
+float mix_multiply(float x, float y) {
+	return x*y;
+}
+
+float mix_add(float x, float y) {
+	return min(x+y, 1.0);
+}
+
+float mix_max(float x, float y) {
+	return max(x, y);
+}
+
+float mix_min(float x, float y) {
+	return min(x, y);
+}
+
+float mix_min(float x, float y) {
+	return min(x, y);
+}
+
+float mix_xor(float x, float y) {
+	return min(x+y, 2.0-x-y);
+}
+
+float mix_pow(float x, float y) {
+	return pow(x, y);
+}
+
+vec3 blend_normal(vec2 uv, vec3 c1, vec3 c2, float opacity) {
+	return opacity*c1 + (1.0-opacity)*c2;
+}
+
+vec3 blend_dissolve(vec2 uv, vec3 c1, vec3 c2, float opacity) {
+	if (rand(uv) < opacity) {
+		return c1;
+	} else {
+		return c2;
+	}
+}
+
+vec3 blend_multiply(vec2 uv, vec3 c1, vec3 c2, float opacity) {
+	return opacity*c1*c2 + (1.0-opacity)*c2;
+}
+
+vec3 blend_screen(vec2 uv, vec3 c1, vec3 c2, float opacity) {
+	return opacity*(1.0-(1.0-c1)*(1.0-c2)) + (1.0-opacity)*c2;
+}
+
+float blend_overlay_f(float c1, float c2) {
+	return (c1 < 0.5) ? (2.0*c1*c2) : (1.0-2.0*(1.0-c1)*(1.0-c2));
+}
+
+vec3 blend_overlay(vec2 uv, vec3 c1, vec3 c2, float opacity) {
+	return opacity*vec3(blend_overlay_f(c1.x, c2.x), blend_overlay_f(c1.y, c2.y), blend_overlay_f(c1.z, c2.z)) + (1.0-opacity)*c2;
+}
+
+vec3 blend_hard_light(vec2 uv, vec3 c1, vec3 c2, float opacity) {
+	return opacity*0.5*(c1*c2+blend_overlay(uv, c1, c2, 1.0)) + (1.0-opacity)*c2;
+}
+
+float blend_soft_light_f(float c1, float c2) {
+	return (c2 < 0.5) ? (2.0*c1*c2+c1*c1*(1.0-2.0*c2)) : 2.0*c1*(1.0-c2)+sqrt(c1)*(2.0*c2-1.0);
+}
+
+vec3 blend_soft_light(vec2 uv, vec3 c1, vec3 c2, float opacity) {
+	return opacity*vec3(blend_soft_light_f(c1.x, c2.x), blend_soft_light_f(c1.y, c2.y), blend_soft_light_f(c1.z, c2.z)) + (1.0-opacity)*c2;
+}
+
+float blend_burn_f(float c1, float c2) {
+	return (c1==0.0)?c1:max((1.0-((1.0-c2)/c1)),0.0);
+}
+
+vec3 blend_burn(vec2 uv, vec3 c1, vec3 c2, float opacity) {
+	return opacity*vec3(blend_burn_f(c1.x, c2.x), blend_burn_f(c1.y, c2.y), blend_burn_f(c1.z, c2.z)) + (1.0-opacity)*c2;
+}
+
+float blend_dodge_f(float c1, float c2) {
+	return (c1==1.0)?c1:min(c2/(1.0-c1),1.0);
+}
+
+vec3 blend_dodge(vec2 uv, vec3 c1, vec3 c2, float opacity) {
+	return opacity*vec3(blend_dodge_f(c1.x, c2.x), blend_dodge_f(c1.y, c2.y), blend_dodge_f(c1.z, c2.z)) + (1.0-opacity)*c2;
+}
+
+vec3 blend_lighten(vec2 uv, vec3 c1, vec3 c2, float opacity) {
+	return opacity*max(c1, c2) + (1.0-opacity)*c2;
+}
+
+vec3 blend_darken(vec2 uv, vec3 c1, vec3 c2, float opacity) {
+	return opacity*min(c1, c2) + (1.0-opacity)*c2;
+}
+
+vec2 transform(vec2 uv, vec2 translate, float rotate, float scale) {
+	vec2 rv;
+	uv -= vec2(0.5);
+	rv.x = cos(rotate)*uv.x + sin(rotate)*uv.y;
+	rv.y = -sin(rotate)*uv.x + cos(rotate)*uv.y;
+	rv /= scale;
+	rv += vec2(0.5);
+	rv -= translate;
+	return rv;
+}
+
+float bricks(vec2 uv, vec2 count, float offset, float mortar, float bevel) {
+	mortar /= max(count.x, count.y);
+	bevel /= max(count.x, count.y);
+	float fract_x = fract(uv.x*count.x+offset*step(0.5, fract(uv.y*count.y*0.5)));
+	float slope_x = 1.0/(bevel*count.x);
+	float off = 0.5*mortar/bevel;
+	float f1 = fract_x*slope_x-off;
+	float f2 = (1.0-fract_x)*slope_x-off;
+	float fract_y = fract(uv.y*count.y);
+	float slope_y = 1.0/(bevel*count.y);
+	float f3 = fract_y*slope_y-off;
+	float f4 = (1.0-fract_y)*slope_y-off;
+	return max(0.0, min(1.0, min(min(f1, f2), min(f3, f4))));
+}
+
+float colored_bricks(vec2 uv, vec2 count, float offset) {
+	float x = floor(uv.x*count.x+offset*step(0.5, fract(uv.y*count.y*0.5)));
+	float y = floor(uv.y*count.y);
+	return fract(x/3.0+y/7.0);
+}
+
+float perlin(vec2 uv, vec2 size, int iterations, float persistence, int seed) {
+	uv += vec2(float(seed)*0.1234567);
+    float rv = 0.0;
+    float coef = 1.0;
+    float acc = 0.0;
+    for (int i = 0; i < iterations; ++i) {
+    	vec2 step = vec2(1.0)/size;
+        float f0 = rand(floor(fract(uv)*size));
+        float f1 = rand(floor(fract(uv+vec2(step.x, 0.0))*size));
+        float f2 = rand(floor(fract(uv+vec2(0.0, step.y))*size));
+        float f3 = rand(floor(fract(uv+vec2(step.x, step.y))*size));
+        vec2 mixval = fract(uv*size);
+        mixval = 0.5*(1.0-cos(3.1415928*mixval));
+        rv += coef * mix(mix(f0, f1, mixval.x), mix(f2, f3, mixval.x), mixval.y);
+        acc += coef;
+        size *= 2.0;
+        coef *= persistence;
+    }
+    
+    return rv / acc;
+}
+
+vec4 voronoi(vec2 uv, vec2 size, float intensity, int seed) {
+	uv += vec2(float(seed)*0.1234567);
+    uv *= size;
+    float best_distance0 = 1.0;
+    float best_distance1 = 1.0;
+    vec2 point0;
+    vec2 point1;
+    vec2 p0 = floor(uv);
+    for (int dx = -1; dx < 2; ++dx) {
+    	for (int dy = -1; dy < 2; ++dy) {
+            vec2 d = vec2(float(dx), float(dy));
+            vec2 p = p0+d;
+            p += rand2(mod(p, size));
+            float distance = length((uv - p) / size);
+            if (best_distance0 > distance) {
+            	best_distance1 = best_distance0;
+            	best_distance0 = distance;
+                point1 = point0;
+                point0 = p;
+            } else if (best_distance1 > distance) {
+            	best_distance1 = distance;
+                point1 = p;
+            }
+        }
+    }
+    float edge_distance = dot(uv - 0.5*(point0+point1), normalize(point0-point1));
+    
+    return vec4(point0, best_distance0*length(size)*intensity, edge_distance);
+}
+
+float Perlin_f(vec2 uv) { return perlin(uv, vec2(4.000000, 4.000000), 6, 0.500000000, 2375); }
+float Bricks_f(vec2 uv) { return bricks(uv, vec2(3, 6), 0.5, 0.05, 0.2); }
+vec3 colorize_3_gradient(float x) {
+  if (x < 0.000000000) {
+    return vec3(0.273438007,0.273438007,0.273438007);
+  } else if (x < 1.000000000) {
+    return vec3(0.273438007,0.273438007,0.273438007)+x*vec3(-0.273438007,-0.273438007,-0.273438007);
+  }
+  return vec3(0.000000000,0.000000000,0.000000000);
+}
+void fragment() {
+float Perlin_0_f = Perlin_f(UV+vec2(0.01, 0.0));
+float Perlin_1_f = Perlin_f(UV-vec2(0.01, 0.0));
+float Perlin_2_f = Perlin_f(UV+vec2(0.0, 0.01));
+float Perlin_3_f = Perlin_f(UV-vec2(0.0, 0.01));
+vec2 Warp_0_uv = UV+0.100000001*vec2((Perlin_0_f)-(Perlin_1_f), (Perlin_2_f)-(Perlin_3_f));
+float Bricks_0_f = Bricks_f(Warp_0_uv);
+vec3 Warp_0_rgb = vec3(Bricks_0_f);
+float Warp_0_f = dot(vec3(Bricks_0_f), vec3(1.0))/3.0;
+vec3 colorize_3_0_rgb = colorize_3_gradient(Warp_0_f);
+COLOR = vec4(colorize_3_0_rgb, 1.0);
+}
+"
+
+[sub_resource type="ShaderMaterial" id=3]
+
+render_priority = 0
+shader = SubResource( 2 )
+
+[node name="GraphEdit" type="GraphEdit"]
+
+self_modulate = Color( 1, 1, 1, 0 )
+anchor_left = 0.0
+anchor_top = 0.0
+anchor_right = 0.0
+anchor_bottom = 0.0
+margin_right = 1280.0
+margin_bottom = 718.0
+rect_pivot_offset = Vector2( 0, 0 )
+rect_clip_content = true
+focus_mode = 2
+mouse_filter = 0
+mouse_default_cursor_shape = 0
+size_flags_horizontal = 1
+size_flags_vertical = 1
+right_disconnects = true
+scroll_offset = Vector2( 0, 0 )
+snap_distance = 20
+use_snap = false
+zoom = 1.0
+script = ExtResource( 1 )
+_sections_unfolded = [ "Material", "Mouse", "Visibility" ]
+
+[node name="Material" type="GraphNode" parent="." index="2" instance=ExtResource( 2 )]
+
+anchor_left = 0.0
+anchor_top = 0.0
+anchor_right = 0.0
+anchor_bottom = 0.0
+margin_right = 111.0
+margin_bottom = 118.0
+rect_pivot_offset = Vector2( 0, 0 )
+rect_clip_content = false
+mouse_filter = 1
+mouse_default_cursor_shape = 0
+size_flags_horizontal = 1
+size_flags_vertical = 1
+theme = SubResource( 1 )
+title = "Material"
+offset = Vector2( 0, 0 )
+show_close = false
+resizable = false
+selected = false
+comment = false
+overlay = 0
+slot/0/left_enabled = true
+slot/0/left_type = 0
+slot/0/left_color = Color( 0.5, 0.5, 1, 1 )
+slot/0/right_enabled = false
+slot/0/right_type = 0
+slot/0/right_color = Color( 0.5, 0.5, 1, 1 )
+slot/1/left_enabled = true
+slot/1/left_type = 0
+slot/1/left_color = Color( 0.5, 0.5, 1, 1 )
+slot/1/right_enabled = false
+slot/1/right_type = 0
+slot/1/right_color = Color( 0.5, 0.5, 1, 1 )
+slot/2/left_enabled = true
+slot/2/left_type = 0
+slot/2/left_color = Color( 0.498039, 0.498039, 1, 1 )
+slot/2/right_enabled = false
+slot/2/right_type = 0
+slot/2/right_color = Color( 0.498039, 0.498039, 1, 1 )
+slot/3/left_enabled = true
+slot/3/left_type = 0
+slot/3/left_color = Color( 0.498039, 0.498039, 1, 1 )
+slot/3/right_enabled = false
+slot/3/right_type = 0
+slot/3/right_color = Color( 0.498039, 0.498039, 1, 1 )
+slot/4/left_enabled = true
+slot/4/left_type = 0
+slot/4/left_color = Color( 0.498039, 0.498039, 1, 1 )
+slot/4/right_enabled = false
+slot/4/right_type = 0
+slot/4/right_color = Color( 0.498039, 0.498039, 1, 1 )
+slot/5/left_enabled = true
+slot/5/left_type = 0
+slot/5/left_color = Color( 0.498039, 0.498039, 1, 1 )
+slot/5/right_enabled = false
+slot/5/right_type = 0
+slot/5/right_color = Color( 0.498039, 0.498039, 1, 1 )
+script = ExtResource( 3 )
+_sections_unfolded = [ "Anchor", "Margin", "Mouse", "Theme", "slot", "slot/2", "slot/3", "slot/4", "slot/5" ]
+
+[node name="Timer" type="Timer" parent="." index="3"]
+
+process_mode = 1
+wait_time = 0.1
+one_shot = true
+autostart = false
+
+[node name="SaveViewport" type="Viewport" parent="." index="4"]
+
+arvr = false
+size = Vector2( 0, 0 )
+own_world = true
+world = null
+transparent_bg = false
+msaa = 2
+hdr = false
+disable_3d = false
+usage = 2
+debug_draw = 0
+render_target_v_flip = true
+render_target_clear_mode = 0
+render_target_update_mode = 1
+audio_listener_enable_2d = false
+audio_listener_enable_3d = false
+physics_object_picking = false
+gui_disable_input = true
+gui_snap_controls_to_pixels = true
+shadow_atlas_size = 0
+shadow_atlas_quad_0 = 2
+shadow_atlas_quad_1 = 2
+shadow_atlas_quad_2 = 3
+shadow_atlas_quad_3 = 4
+_sections_unfolded = [ "GUI", "Render Target", "Rendering" ]
+
+[node name="ColorRect" type="ColorRect" parent="SaveViewport" index="0"]
+
+material = SubResource( 3 )
+anchor_left = 0.0
+anchor_top = 0.0
+anchor_right = 0.0
+anchor_bottom = 0.0
+margin_right = 40.0
+margin_bottom = 40.0
+rect_pivot_offset = Vector2( 0, 0 )
+rect_clip_content = false
+mouse_filter = 0
+mouse_default_cursor_shape = 0
+size_flags_horizontal = 1
+size_flags_vertical = 1
+color = Color( 1, 1, 1, 1 )
+_sections_unfolded = [ "Material", "Rect" ]
+
+[node name="Timer" type="Timer" parent="SaveViewport" index="1"]
+
+process_mode = 1
+wait_time = 0.1
+one_shot = true
+autostart = false
+
+[connection signal="connection_request" from="." to="." method="_on_GraphEdit_connection_request"]
+
+[connection signal="disconnection_request" from="." to="." method="_on_GraphEdit_disconnection_request"]
+
+[connection signal="timeout" from="Timer" to="." method="do_send_changed_signal"]
+
+
diff --git a/addons/procedural_material/pm_editor.tscn b/addons/procedural_material/pm_editor.tscn
index ea5563a..34f086b 100644
--- a/addons/procedural_material/pm_editor.tscn
+++ b/addons/procedural_material/pm_editor.tscn
@@ -1,249 +1,11 @@
-[gd_scene load_steps=18 format=2]
+[gd_scene load_steps=15 format=2]
 
 [ext_resource path="res://addons/procedural_material/pm_editor.gd" type="Script" id=1]
-[ext_resource path="res://addons/procedural_material/graph_edit.gd" type="Script" id=2]
-[ext_resource path="res://addons/procedural_material/nodes/material.tscn" type="PackedScene" id=3]
-[ext_resource path="res://addons/procedural_material/preview.gd" type="Script" id=4]
-[ext_resource path="res://addons/procedural_material/panoramas/park.hdr" type="Texture" id=5]
+[ext_resource path="res://addons/procedural_material/graph_edit.tscn" type="PackedScene" id=2]
+[ext_resource path="res://addons/procedural_material/preview.gd" type="Script" id=3]
+[ext_resource path="res://addons/procedural_material/panoramas/park.hdr" type="Texture" id=4]
 
-[sub_resource type="Shader" id=1]
-
-code = "shader_type canvas_item;
-
-float rand(vec2 x) {
-    return fract(sin(dot(x, vec2(13.9898, 8.141))) * 43758.5453);
-}
-
-vec2 rand2(vec2 x) {
-    return fract(sin(vec2(dot(x, vec2(13.9898, 8.141)),
-						  dot(x, vec2(3.4562, 17.398)))) * 43758.5453);
-}
-
-vec3 rand3(vec2 x) {
-    return fract(sin(vec3(dot(x, vec2(13.9898, 8.141)),
-                          dot(x, vec2(3.4562, 17.398)),
-                          dot(x, vec2(13.254, 5.867)))) * 43758.5453);
-}
-
-float wave_sin(float x) {
-	return 0.5-0.5*cos(3.1415928*2.0*x);
-}
-
-float wave_saw(float x) {
-	x = fract(x);
-	return min(2.0*x, 2.0-2.0*x);
-}
-
-float wave_square(float x) {
-	return (fract(x) < 0.5) ? 0.0 : 1.0;
-}
-
-float mix_multiply(float x, float y) {
-	return x*y;
-}
-
-float mix_add(float x, float y) {
-	return min(x+y, 1.0);
-}
-
-float mix_max(float x, float y) {
-	return max(x, y);
-}
-
-float mix_min(float x, float y) {
-	return min(x, y);
-}
-
-float mix_min(float x, float y) {
-	return min(x, y);
-}
-
-float mix_xor(float x, float y) {
-	return min(x+y, 2.0-x-y);
-}
-
-float mix_pow(float x, float y) {
-	return pow(x, y);
-}
-
-vec3 blend_normal(vec2 uv, vec3 c1, vec3 c2, float opacity) {
-	return opacity*c1 + (1.0-opacity)*c2;
-}
-
-vec3 blend_dissolve(vec2 uv, vec3 c1, vec3 c2, float opacity) {
-	if (rand(uv) < opacity) {
-		return c1;
-	} else {
-		return c2;
-	}
-}
-
-vec3 blend_multiply(vec2 uv, vec3 c1, vec3 c2, float opacity) {
-	return opacity*c1*c2 + (1.0-opacity)*c2;
-}
-
-vec3 blend_screen(vec2 uv, vec3 c1, vec3 c2, float opacity) {
-	return opacity*(1.0-(1.0-c1)*(1.0-c2)) + (1.0-opacity)*c2;
-}
-
-float blend_overlay_f(float c1, float c2) {
-	return (c1 < 0.5) ? (2.0*c1*c2) : (1.0-2.0*(1.0-c1)*(1.0-c2));
-}
-
-vec3 blend_overlay(vec2 uv, vec3 c1, vec3 c2, float opacity) {
-	return opacity*vec3(blend_overlay_f(c1.x, c2.x), blend_overlay_f(c1.y, c2.y), blend_overlay_f(c1.z, c2.z)) + (1.0-opacity)*c2;
-}
-
-vec3 blend_hard_light(vec2 uv, vec3 c1, vec3 c2, float opacity) {
-	return opacity*0.5*(c1*c2+blend_overlay(uv, c1, c2, 1.0)) + (1.0-opacity)*c2;
-}
-
-float blend_soft_light_f(float c1, float c2) {
-	return (c2 < 0.5) ? (2.0*c1*c2+c1*c1*(1.0-2.0*c2)) : 2.0*c1*(1.0-c2)+sqrt(c1)*(2.0*c2-1.0);
-}
-
-vec3 blend_soft_light(vec2 uv, vec3 c1, vec3 c2, float opacity) {
-	return opacity*vec3(blend_soft_light_f(c1.x, c2.x), blend_soft_light_f(c1.y, c2.y), blend_soft_light_f(c1.z, c2.z)) + (1.0-opacity)*c2;
-}
-
-float blend_burn_f(float c1, float c2) {
-	return (c1==0.0)?c1:max((1.0-((1.0-c2)/c1)),0.0);
-}
-
-vec3 blend_burn(vec2 uv, vec3 c1, vec3 c2, float opacity) {
-	return opacity*vec3(blend_burn_f(c1.x, c2.x), blend_burn_f(c1.y, c2.y), blend_burn_f(c1.z, c2.z)) + (1.0-opacity)*c2;
-}
-
-float blend_dodge_f(float c1, float c2) {
-	return (c1==1.0)?c1:min(c2/(1.0-c1),1.0);
-}
-
-vec3 blend_dodge(vec2 uv, vec3 c1, vec3 c2, float opacity) {
-	return opacity*vec3(blend_dodge_f(c1.x, c2.x), blend_dodge_f(c1.y, c2.y), blend_dodge_f(c1.z, c2.z)) + (1.0-opacity)*c2;
-}
-
-vec3 blend_lighten(vec2 uv, vec3 c1, vec3 c2, float opacity) {
-	return opacity*max(c1, c2) + (1.0-opacity)*c2;
-}
-
-vec3 blend_darken(vec2 uv, vec3 c1, vec3 c2, float opacity) {
-	return opacity*min(c1, c2) + (1.0-opacity)*c2;
-}
-
-vec2 transform(vec2 uv, vec2 translate, float rotate, float scale) {
-	vec2 rv;
-	uv -= vec2(0.5);
-	rv.x = cos(rotate)*uv.x + sin(rotate)*uv.y;
-	rv.y = -sin(rotate)*uv.x + cos(rotate)*uv.y;
-	rv /= scale;
-	rv += vec2(0.5);
-	rv -= translate;
-	return rv;
-}
-
-float bricks(vec2 uv, vec2 count, float offset, float mortar, float bevel) {
-	mortar /= max(count.x, count.y);
-	bevel /= max(count.x, count.y);
-	float fract_x = fract(uv.x*count.x+offset*step(0.5, fract(uv.y*count.y*0.5)));
-	float slope_x = 1.0/(bevel*count.x);
-	float off = 0.5*mortar/bevel;
-	float f1 = fract_x*slope_x-off;
-	float f2 = (1.0-fract_x)*slope_x-off;
-	float fract_y = fract(uv.y*count.y);
-	float slope_y = 1.0/(bevel*count.y);
-	float f3 = fract_y*slope_y-off;
-	float f4 = (1.0-fract_y)*slope_y-off;
-	return max(0.0, min(1.0, min(min(f1, f2), min(f3, f4))));
-}
-
-float colored_bricks(vec2 uv, vec2 count, float offset) {
-	float x = floor(uv.x*count.x+offset*step(0.5, fract(uv.y*count.y*0.5)));
-	float y = floor(uv.y*count.y);
-	return fract(x/3.0+y/7.0);
-}
-
-float perlin(vec2 uv, vec2 size, int iterations, float persistence, int seed) {
-	uv += vec2(float(seed)*0.1234567);
-    float rv = 0.0;
-    float coef = 1.0;
-    float acc = 0.0;
-    for (int i = 0; i < iterations; ++i) {
-    	vec2 step = vec2(1.0)/size;
-        float f0 = rand(floor(fract(uv)*size));
-        float f1 = rand(floor(fract(uv+vec2(step.x, 0.0))*size));
-        float f2 = rand(floor(fract(uv+vec2(0.0, step.y))*size));
-        float f3 = rand(floor(fract(uv+vec2(step.x, step.y))*size));
-        vec2 mixval = fract(uv*size);
-        mixval = 0.5*(1.0-cos(3.1415928*mixval));
-        rv += coef * mix(mix(f0, f1, mixval.x), mix(f2, f3, mixval.x), mixval.y);
-        acc += coef;
-        size *= 2.0;
-        coef *= persistence;
-    }
-    
-    return rv / acc;
-}
-
-vec4 voronoi(vec2 uv, vec2 size, float intensity, int seed) {
-	uv += vec2(float(seed)*0.1234567);
-    uv *= size;
-    float best_distance0 = 1.0;
-    float best_distance1 = 1.0;
-    vec2 point0;
-    vec2 point1;
-    vec2 p0 = floor(uv);
-    for (int dx = -1; dx < 2; ++dx) {
-    	for (int dy = -1; dy < 2; ++dy) {
-            vec2 d = vec2(float(dx), float(dy));
-            vec2 p = p0+d;
-            p += rand2(mod(p, size));
-            float distance = length((uv - p) / size);
-            if (best_distance0 > distance) {
-            	best_distance1 = best_distance0;
-            	best_distance0 = distance;
-                point1 = point0;
-                point0 = p;
-            } else if (best_distance1 > distance) {
-            	best_distance1 = distance;
-                point1 = p;
-            }
-        }
-    }
-    float edge_distance = dot(uv - 0.5*(point0+point1), normalize(point0-point1));
-    
-    return vec4(point0, best_distance0*length(size)*intensity, edge_distance);
-}
-
-float Perlin_f(vec2 uv) { return perlin(uv, vec2(4.000000, 4.000000), 6, 0.500000000, 2375); }
-float Bricks_f(vec2 uv) { return bricks(uv, vec2(3, 6), 0.5, 0.05, 0.2); }
-vec3 colorize_3_gradient(float x) {
-  if (x < 0.000000000) {
-    return vec3(0.273438007,0.273438007,0.273438007);
-  } else if (x < 1.000000000) {
-    return vec3(0.273438007,0.273438007,0.273438007)+x*vec3(-0.273438007,-0.273438007,-0.273438007);
-  }
-  return vec3(0.000000000,0.000000000,0.000000000);
-}
-void fragment() {
-float Perlin_0_f = Perlin_f(UV+vec2(0.01, 0.0));
-float Perlin_1_f = Perlin_f(UV-vec2(0.01, 0.0));
-float Perlin_2_f = Perlin_f(UV+vec2(0.0, 0.01));
-float Perlin_3_f = Perlin_f(UV-vec2(0.0, 0.01));
-vec2 Warp_0_uv = UV+0.100000001*vec2((Perlin_0_f)-(Perlin_1_f), (Perlin_2_f)-(Perlin_3_f));
-float Bricks_0_f = Bricks_f(Warp_0_uv);
-vec3 Warp_0_rgb = vec3(Bricks_0_f);
-float Warp_0_f = dot(vec3(Bricks_0_f), vec3(1.0))/3.0;
-vec3 colorize_3_0_rgb = colorize_3_gradient(Warp_0_f);
-COLOR = vec4(colorize_3_0_rgb, 1.0);
-}
-"
-
-[sub_resource type="ShaderMaterial" id=2]
-
-render_priority = 0
-shader = SubResource( 1 )
-
-[sub_resource type="Animation" id=3]
+[sub_resource type="Animation" id=1]
 
 length = 1.0
 loop = true
@@ -261,7 +23,7 @@ tracks/0/keys = {
 "values": [ Vector3( 0, 0, 0 ), Vector3( 0, 360, 0 ) ]
 }
 
-[sub_resource type="ArrayMesh" id=4]
+[sub_resource type="ArrayMesh" id=2]
 
 blend_shape_mode = 1
 custom_aabb = AABB( 0, 0, 0, 0, 0, 0 )
@@ -279,7 +41,7 @@ surfaces/0 = {
 }
 _sections_unfolded = [ "surface_1" ]
 
-[sub_resource type="SpatialMaterial" id=5]
+[sub_resource type="SpatialMaterial" id=3]
 
 render_priority = 0
 flags_transparent = false
@@ -333,7 +95,7 @@ proximity_fade_enable = false
 distance_fade_enable = false
 _sections_unfolded = [ "Depth", "Metallic" ]
 
-[sub_resource type="ArrayMesh" id=6]
+[sub_resource type="ArrayMesh" id=4]
 
 blend_shape_mode = 1
 custom_aabb = AABB( 0, 0, 0, 0, 0, 0 )
@@ -350,15 +112,15 @@ surfaces/0 = {
 }
 _sections_unfolded = [ "surface_1" ]
 
-[sub_resource type="PanoramaSky" id=7]
+[sub_resource type="PanoramaSky" id=5]
 
 radiance_size = 2
-panorama = ExtResource( 5 )
+panorama = ExtResource( 4 )
 
-[sub_resource type="Environment" id=8]
+[sub_resource type="Environment" id=6]
 
 background_mode = 2
-background_sky = SubResource( 7 )
+background_sky = SubResource( 5 )
 background_sky_custom_fov = 0.0
 background_color = Color( 0, 0, 0, 1 )
 background_energy = 1.0
@@ -435,7 +197,7 @@ adjustment_contrast = 1.0
 adjustment_saturation = 1.0
 _sections_unfolded = [ "Background" ]
 
-[sub_resource type="Shader" id=9]
+[sub_resource type="Shader" id=7]
 
 code = "shader_type canvas_item;
 
@@ -445,12 +207,12 @@ void fragment() {
 "
 _sections_unfolded = [ "Resource" ]
 
-[sub_resource type="ShaderMaterial" id=10]
+[sub_resource type="ShaderMaterial" id=8]
 
 render_priority = 0
-shader = SubResource( 9 )
+shader = SubResource( 7 )
 
-[sub_resource type="Animation" id=11]
+[sub_resource type="Animation" id=9]
 
 length = 0.2
 loop = false
@@ -492,7 +254,7 @@ tracks/2/keys = {
 "values": [ 0 ]
 }
 
-[sub_resource type="Animation" id=12]
+[sub_resource type="Animation" id=10]
 
 length = 0.2
 loop = false
@@ -552,95 +314,7 @@ custom_constants/margin_left = 0
 script = ExtResource( 1 )
 _sections_unfolded = [ "Rect" ]
 
-[node name="GraphEdit" type="GraphEdit" parent="." index="0"]
-
-self_modulate = Color( 1, 1, 1, 0 )
-anchor_left = 0.0
-anchor_top = 0.0
-anchor_right = 0.0
-anchor_bottom = 0.0
-margin_right = 1280.0
-margin_bottom = 718.0
-rect_pivot_offset = Vector2( 0, 0 )
-rect_clip_content = true
-focus_mode = 2
-mouse_filter = 0
-mouse_default_cursor_shape = 0
-size_flags_horizontal = 1
-size_flags_vertical = 1
-right_disconnects = true
-scroll_offset = Vector2( 0, 0 )
-snap_distance = 20
-use_snap = false
-zoom = 1.0
-script = ExtResource( 2 )
-_sections_unfolded = [ "Material", "Mouse", "Visibility" ]
-
-[node name="Material" parent="GraphEdit" index="0" instance=ExtResource( 3 )]
-
-margin_right = 111.0
-margin_bottom = 118.0
-_sections_unfolded = [ "Anchor", "Margin", "Mouse", "Theme", "slot", "slot/2", "slot/3", "slot/4", "slot/5" ]
-
-[node name="Timer" type="Timer" parent="GraphEdit" index="1"]
-
-process_mode = 1
-wait_time = 0.1
-one_shot = true
-autostart = false
-
-[node name="SaveViewport" type="Viewport" parent="GraphEdit" index="2"]
-
-editor/display_folded = true
-arvr = false
-size = Vector2( 0, 0 )
-own_world = true
-world = null
-transparent_bg = false
-msaa = 2
-hdr = false
-disable_3d = false
-usage = 2
-debug_draw = 0
-render_target_v_flip = true
-render_target_clear_mode = 0
-render_target_update_mode = 1
-audio_listener_enable_2d = false
-audio_listener_enable_3d = false
-physics_object_picking = false
-gui_disable_input = true
-gui_snap_controls_to_pixels = true
-shadow_atlas_size = 0
-shadow_atlas_quad_0 = 2
-shadow_atlas_quad_1 = 2
-shadow_atlas_quad_2 = 3
-shadow_atlas_quad_3 = 4
-_sections_unfolded = [ "GUI", "Render Target", "Rendering" ]
-
-[node name="ColorRect" type="ColorRect" parent="GraphEdit/SaveViewport" index="0"]
-
-material = SubResource( 2 )
-anchor_left = 0.0
-anchor_top = 0.0
-anchor_right = 0.0
-anchor_bottom = 0.0
-margin_right = 40.0
-margin_bottom = 40.0
-rect_pivot_offset = Vector2( 0, 0 )
-rect_clip_content = false
-mouse_filter = 0
-mouse_default_cursor_shape = 0
-size_flags_horizontal = 1
-size_flags_vertical = 1
-color = Color( 1, 1, 1, 1 )
-_sections_unfolded = [ "Material", "Rect" ]
-
-[node name="Timer" type="Timer" parent="GraphEdit/SaveViewport" index="1"]
-
-process_mode = 1
-wait_time = 0.1
-one_shot = true
-autostart = false
+[node name="GraphEdit" parent="." index="0" instance=ExtResource( 2 )]
 
 [node name="Preview" type="Container" parent="." index="1"]
 
@@ -677,7 +351,7 @@ size_flags_horizontal = 1
 size_flags_vertical = 1
 stretch = false
 stretch_shrink = 1
-script = ExtResource( 4 )
+script = ExtResource( 3 )
 _sections_unfolded = [ "Anchor", "Grow Direction", "Margin", "Mouse", "Rect" ]
 
 [node name="ObjectRotate" type="AnimationPlayer" parent="Preview/Preview" index="0"]
@@ -687,7 +361,7 @@ autoplay = "rotate"
 playback_process_mode = 1
 playback_default_blend_time = 0.0
 playback_speed = 0.1
-anims/rotate = SubResource( 3 )
+anims/rotate = SubResource( 1 )
 blend_times = [  ]
 _sections_unfolded = [ "Playback Options" ]
 
@@ -720,7 +394,7 @@ _sections_unfolded = [ "GUI", "Render Target" ]
 
 [node name="Objects" type="Spatial" parent="Preview/Preview/MaterialPreview" index="0"]
 
-transform = Transform( -0.0754918, 0, -0.997143, 0, 1, 0, 0.997143, 0, -0.0754918, 0, 0, 0 )
+transform = Transform( 0.305445, 0, 0.952206, 0, 1, 0, -0.952206, 0, 0.305445, 0, 0, 0 )
 _sections_unfolded = [ "Transform" ]
 
 [node name="Cube" type="MeshInstance" parent="Preview/Preview/MaterialPreview/Objects" index="0"]
@@ -734,9 +408,9 @@ lod_min_distance = 0.0
 lod_min_hysteresis = 0.0
 lod_max_distance = 0.0
 lod_max_hysteresis = 0.0
-mesh = SubResource( 4 )
+mesh = SubResource( 2 )
 skeleton = NodePath("..")
-material/0 = SubResource( 5 )
+material/0 = SubResource( 3 )
 _sections_unfolded = [ "Geometry", "Transform", "material" ]
 
 [node name="Cylinder" type="MeshInstance" parent="Preview/Preview/MaterialPreview/Objects" index="1"]
@@ -751,9 +425,9 @@ lod_min_distance = 0.0
 lod_min_hysteresis = 0.0
 lod_max_distance = 0.0
 lod_max_hysteresis = 0.0
-mesh = SubResource( 6 )
+mesh = SubResource( 4 )
 skeleton = NodePath("..")
-material/0 = SubResource( 5 )
+material/0 = SubResource( 3 )
 _sections_unfolded = [ "Geometry", "Transform", "material" ]
 
 [node name="OmniLight" type="OmniLight" parent="Preview/Preview/MaterialPreview" index="1"]
@@ -784,7 +458,7 @@ _sections_unfolded = [ "Shadow" ]
 transform = Transform( 1, 0, 0, 0, 0.766044, 0.642787, 0, -0.642787, 0.766044, 0, 1.83022, 2.2549 )
 keep_aspect = 1
 cull_mask = 1048575
-environment = SubResource( 8 )
+environment = SubResource( 6 )
 h_offset = 0.0
 v_offset = 0.0
 doppler_tracking = 0
@@ -798,7 +472,7 @@ _sections_unfolded = [ "Transform" ]
 
 [node name="WorldEnvironment" type="WorldEnvironment" parent="Preview/Preview/MaterialPreview" index="3"]
 
-environment = SubResource( 8 )
+environment = SubResource( 6 )
 
 [node name="Model" type="OptionButton" parent="Preview/Preview" index="2"]
 
@@ -858,7 +532,7 @@ selected = 3
 
 [node name="SelectedPreview" type="ColorRect" parent="Preview/Preview" index="4"]
 
-material = SubResource( 10 )
+material = SubResource( 8 )
 anchor_left = 0.0
 anchor_top = 0.0
 anchor_right = 0.0
@@ -884,22 +558,16 @@ autoplay = ""
 playback_process_mode = 1
 playback_default_blend_time = 0.0
 playback_speed = 1.0
-anims/maximize = SubResource( 11 )
-anims/minimize = SubResource( 12 )
+anims/maximize = SubResource( 9 )
+anims/minimize = SubResource( 10 )
 blend_times = [  ]
 
-[connection signal="connection_request" from="GraphEdit" to="GraphEdit" method="_on_GraphEdit_connection_request"]
-
-[connection signal="disconnection_request" from="GraphEdit" to="GraphEdit" method="_on_GraphEdit_disconnection_request"]
-
 [connection signal="graph_changed" from="GraphEdit" to="." method="generate_shader"]
 
 [connection signal="node_selected" from="GraphEdit" to="." method="_on_GraphEdit_node_selected"]
 
 [connection signal="popup_request" from="GraphEdit" to="." method="_on_GraphEdit_popup_request"]
 
-[connection signal="timeout" from="GraphEdit/Timer" to="GraphEdit" method="do_send_changed_signal"]
-
 [connection signal="item_selected" from="Preview/Preview/Model" to="Preview/Preview" method="_on_Model_item_selected"]
 
 [connection signal="item_selected" from="Preview/Preview/Environment" to="Preview/Preview" method="_on_Environment_item_selected"]
diff --git a/addons/procedural_material/widgets/gradient_editor.gd b/addons/procedural_material/widgets/gradient_editor.gd
index 71220ff..8b7f554 100644
--- a/addons/procedural_material/widgets/gradient_editor.gd
+++ b/addons/procedural_material/widgets/gradient_editor.gd
@@ -61,6 +61,7 @@ var active_cursor
 
 func select_color(cursor, position):
 	active_cursor = cursor
+	$Gradient/Popup/ColorPicker.color = cursor.color
 	$Gradient/Popup/ColorPicker.connect("color_changed", cursor, "set_color")
 	$Gradient/Popup.rect_position = position
 	$Gradient/Popup.popup()
diff --git a/addons/procedural_material/widgets/gradient_editor.tscn b/addons/procedural_material/widgets/gradient_editor.tscn
index 2f3a876..7463d82 100644
--- a/addons/procedural_material/widgets/gradient_editor.tscn
+++ b/addons/procedural_material/widgets/gradient_editor.tscn
@@ -86,8 +86,8 @@ anchor_right = 0.0
 anchor_bottom = 0.0
 margin_left = 4.0
 margin_top = 4.0
-margin_right = 302.0
-margin_bottom = 438.0
+margin_right = 4.0
+margin_bottom = 4.0
 rect_scale = Vector2( 0.75, 0.75 )
 rect_pivot_offset = Vector2( 0, 0 )
 rect_clip_content = false
diff --git a/examples/bricks.ptex b/examples/bricks.ptex
index f30e6e7..2963211 100644
--- a/examples/bricks.ptex
+++ b/examples/bricks.ptex
@@ -1 +1 @@
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\ No newline at end of file
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