diff --git a/src/UI/TransparentChecker.gd b/src/UI/TransparentChecker.gd
index 415161b..2b5c989 100644
--- a/src/UI/TransparentChecker.gd
+++ b/src/UI/TransparentChecker.gd
@@ -3,6 +3,9 @@ extends ColorRect
 
 func _ready() -> void:
 	rect_size = Global.current_project.size
+	if get_parent().get_parent() == Global.main_viewport:
+		Global.second_viewport.get_node("Viewport/TransparentChecker")._ready()
+		Global.small_preview_viewport.get_node("Viewport/TransparentChecker")._ready()
 	material.set_shader_param("size", Global.checker_size)
 	material.set_shader_param("color1", Global.checker_color_1)
 	material.set_shader_param("color2", Global.checker_color_2)