diff --git a/material_maker/panels/preview_2d/preview_2d_panel.gd b/material_maker/panels/preview_2d/preview_2d_panel.gd
index 179df974..1cea503e 100644
--- a/material_maker/panels/preview_2d/preview_2d_panel.gd
+++ b/material_maker/panels/preview_2d/preview_2d_panel.gd
@@ -6,16 +6,23 @@ export(String, MULTILINE) var shader_divide : String = ""
 var center : Vector2 = Vector2(0.5, 0.5)
 var scale : float = 1.2
 
+var view_mode : int = 0
+
 var temporal_aa : bool = false
 var temporal_aa_current : bool = false
 
+
 func _ready():
 	update_shader_options()
+	update_view_menu()
 	update_axes_menu()
 	update_export_menu()
 	$ContextMenu.add_check_item("Temporal AA", MENU_TEMPORAL_AA)
 	$ContextMenu.set_item_checked(MENU_TEMPORAL_AA, temporal_aa)
 
+func update_view_menu() -> void:
+	$ContextMenu.add_submenu_item("View", "View")
+
 func update_axes_menu() -> void:
 	$ContextMenu/Axes.clear()
 	for s in $Axes.STYLES:
@@ -41,6 +48,9 @@ func update_material(source):
 		start_accumulate()
 	else:
 		.update_material(source)
+		material.set_shader_param("mode", view_mode)
+		material.set_shader_param("background_color_1", Color(0.4, 0.4, 0.4))
+		material.set_shader_param("background_color_2", Color(0.6, 0.6, 0.6))
 
 var started : bool = false
 var divide : int = 0
@@ -191,6 +201,10 @@ func _on_ContextMenu_id_pressed(id) -> void:
 		_:
 			print("unsupported id "+str(id))
 
+func _on_View_id_pressed(id):
+	view_mode = id
+	material.set_shader_param("mode", view_mode)
+
 func _on_Axes_id_pressed(id):
 	if id == 1000:
 		var color_picker_popup = preload("res://material_maker/widgets/color_picker_popup/color_picker_popup.tscn").instance()
diff --git a/material_maker/panels/preview_2d/preview_2d_panel.tscn b/material_maker/panels/preview_2d/preview_2d_panel.tscn
index 7d05257e..74a19e39 100644
--- a/material_maker/panels/preview_2d/preview_2d_panel.tscn
+++ b/material_maker/panels/preview_2d/preview_2d_panel.tscn
@@ -45,14 +45,24 @@ script = ExtResource( 4 )
 shader = "uniform vec2 preview_2d_size = vec2(100.0);
 uniform float preview_2d_scale = 1.2;
 uniform vec2 preview_2d_center = vec2(0.5);
+uniform int mode = 0;
+uniform vec4 background_color_1 = vec4(0.0);
+uniform vec4 background_color_2 = vec4(1.0);
 
 void fragment() {
 	vec2 ratio = preview_2d_size;
 	vec2 uv = preview_2d_center+(UV-0.5)*preview_2d_scale*ratio/min(ratio.x, ratio.y);
-	vec4 image = preview_2d(uv);
-	float checkerboard = mod(floor(uv.x*32.0)+floor(uv.y*32.0), 2.0);
-	vec3 image_with_background = mix(vec3(checkerboard), image.xyz, image.a);
-	COLOR = vec4(image_with_background, 1.0);
+	if (mode == 2 && (uv.x < 0.0 || uv.x > 1.0 || uv.y < 0.0 || uv.y > 1.0)) {
+		COLOR = vec4(0.5);
+	} else {
+		if (mode == 1) {
+			uv = fract(uv);
+		}
+		vec4 image = preview_2d(uv);
+		float checkerboard = mod(floor(uv.x*32.0)+floor(uv.y*32.0), 2.0);
+		vec3 image_with_background = mix(mix(background_color_1, background_color_2, checkerboard).rgb, image.rgb, image.a);
+		COLOR = vec4(image_with_background, 1.0);
+	}
 }
 "
 shader_accumulate = "uniform sampler2D sum;
@@ -193,15 +203,20 @@ margin_right = 109.0
 margin_bottom = 52.0
 items = [ "Reset view", null, 0, false, false, 0, 0, null, "", false ]
 
-[node name="Axes" type="PopupMenu" parent="ContextMenu" index="1"]
+[node name="View" type="PopupMenu" parent="ContextMenu" index="0"]
+margin_right = 91.0
+margin_bottom = 88.0
+items = [ "Extend", null, 0, false, false, 0, 0, null, "", false, "Repeat", null, 0, false, false, 1, 0, null, "", false, "Clamp", null, 0, false, false, 2, 0, null, "", false ]
+
+[node name="Axes" type="PopupMenu" parent="ContextMenu" index="2"]
 margin_right = 91.0
 margin_bottom = 88.0
 
-[node name="Export" type="PopupMenu" parent="ContextMenu" index="2"]
+[node name="Export" type="PopupMenu" parent="ContextMenu" index="3"]
 margin_right = 91.0
 margin_bottom = 88.0
 
-[node name="Reference" type="PopupMenu" parent="ContextMenu" index="3"]
+[node name="Reference" type="PopupMenu" parent="ContextMenu" index="4"]
 margin_right = 91.0
 margin_bottom = 88.0
 
@@ -222,6 +237,7 @@ margin_bottom = 40.0
 
 [connection signal="gui_input" from="." to="." method="_on_gui_input"]
 [connection signal="id_pressed" from="ContextMenu" to="." method="_on_ContextMenu_id_pressed"]
+[connection signal="id_pressed" from="ContextMenu/View" to="." method="_on_View_id_pressed"]
 [connection signal="id_pressed" from="ContextMenu/Axes" to="." method="_on_Axes_id_pressed"]
 [connection signal="id_pressed" from="ContextMenu/Export" to="." method="_on_Export_id_pressed"]
 [connection signal="id_pressed" from="ContextMenu/Reference" to="." method="_on_Reference_id_pressed"]