diff --git a/material_maker/windows/export_animation/export_animation.gd b/material_maker/windows/export_animation/export_animation.gd
index 6e346153..172dc623 100644
--- a/material_maker/windows/export_animation/export_animation.gd
+++ b/material_maker/windows/export_animation/export_animation.gd
@@ -90,7 +90,9 @@ func _on_Export_pressed():
 		var begin : float = value_begin.value
 		var end : float = value_end.value
 		var images : int = value_images.value
-		var spritesheet_lines : int = value_spritesheet.get_item_id(value_spritesheet.selected)
+		var spritesheet_lines : int = value_spritesheet.get_item_id(value_spritesheet.selected) 
+		if spritesheet_lines > 500:
+			spritesheet_lines = 1000-spritesheet_lines
 		var spritesheet_columns : int
 		var renderer = mm_renderer.request(self)
 		while renderer is GDScriptFunctionState:
@@ -99,8 +101,12 @@ func _on_Export_pressed():
 		image_anim.material.set_shader_param("end", begin)
 		var spritesheet : Image
 		var filename_fmt
-		if spritesheet_lines > 0:
-			spritesheet_columns = (images-1)/spritesheet_lines+1
+		if spritesheet_lines != 0:
+			if spritesheet_lines > 0:
+				spritesheet_columns = (images-1)/spritesheet_lines+1
+			else:
+				spritesheet_columns = -spritesheet_lines
+				spritesheet_lines = (images-1)/spritesheet_columns+1
 			spritesheet = Image.new()
 			spritesheet.create(size * spritesheet_columns, size * spritesheet_lines, false, Image.FORMAT_RGBA8)
 		else:
@@ -131,3 +137,7 @@ func _on_Export_pressed():
 			spritesheet.save_png(filename)
 		image_anim.material.set_shader_param("begin", begin)
 		image_anim.material.set_shader_param("end", end)
+
+
+func _on_VBox_minimum_size_changed():
+	rect_size = $VBox.rect_size+Vector2(4, 4)
diff --git a/material_maker/windows/export_animation/export_animation.tscn b/material_maker/windows/export_animation/export_animation.tscn
index dfcad8d3..2d52c067 100644
--- a/material_maker/windows/export_animation/export_animation.tscn
+++ b/material_maker/windows/export_animation/export_animation.tscn
@@ -211,7 +211,7 @@ margin_left = 550.0
 margin_right = 638.0
 margin_bottom = 24.0
 text = "PNG files"
-items = [ "PNG files", null, false, 0, null, "1 line spritesheet", null, false, 1, null, "2 lines spritesheet", null, false, 2, null, "4 lines spritesheet", null, false, 4, null ]
+items = [ "PNG files", null, false, 0, null, "1 line spritesheet", null, false, 1, null, "2 lines spritesheet", null, false, 2, null, "4 lines spritesheet", null, false, 4, null, "1 column spritesheet", null, false, 1001, null ]
 selected = 0
 
 [node name="Images" type="MarginContainer" parent="VBox"]
@@ -313,6 +313,7 @@ rect_min_size = Vector2( 80, 0 )
 text = "Close"
 
 [connection signal="popup_hide" from="." to="." method="queue_free"]
+[connection signal="minimum_size_changed" from="VBox" to="." method="_on_VBox_minimum_size_changed"]
 [connection signal="value_changed" from="VBox/Settings/Begin" to="." method="_on_Begin_value_changed"]
 [connection signal="value_changed" from="VBox/Settings/End" to="." method="_on_End_value_changed"]
 [connection signal="timeout" from="VBox/Images/HBox/Animated/Timer" to="." method="_on_Timer_timeout"]