diff --git a/init.lua b/init.lua
index f8c87f3..c657fa3 100644
--- a/init.lua
+++ b/init.lua
@@ -23,7 +23,7 @@ signs_lib.register_sign("basic_signs:sign_wall_locked", {
 	allow_onpole = true,
 	allow_onpole_horizontal = true,
 	allow_yard = true,
-	use_texture_alpha = "opaque",
+	use_texture_alpha = "clip",
 })
 
 signs_lib.register_sign("basic_signs:sign_wall_glass", {
@@ -94,7 +94,7 @@ signs_lib.register_sign("basic_signs:sign_wall_plastic", {
 	allow_onpole = true,
 	allow_onpole_horizontal = true,
 	allow_yard = true,
-	use_texture_alpha = "opaque",
+	use_texture_alpha = "clip",
 })
 
 -- array : color, translated color, default text color
@@ -138,7 +138,7 @@ for i, color in ipairs(sign_colors) do
 		allow_onpole = true,
 		allow_onpole_horizontal = true,
 		allow_yard = true,
-		use_texture_alpha = "opaque",
+		use_texture_alpha = "clip",
 	})
 
 	minetest.register_alias("basic_signs:sign_wall_steel_"..color[1].."_onpole",       "basic_signs:sign_steel_"..color[1].."_onpole")