Added a special resource to contain unique instances of BugMarker materials.

Materials/BugMarker/bug_marker_material_pack.gd

@@ -0,0 +1,5 @@
+class_name BugMarkerMaterialPack
+extends Resource
+
+@export var arrow : ShaderMaterial
+@export var icon : ShaderMaterial

Scenes/bug_marker.gd

@@ -1,25 +1,23 @@
 class_name BugMarker
 extends Node3D
 
+@export_group("Marker", "marker_")
 enum BugStatus { NEUTRAL, UNRESOLVED, IN_PROGRESS, RESOLVED }
 @export var marker_status : BugStatus = BugStatus.NEUTRAL : set = __set_marker_status
-const NEUTRAL_COLOUR = Color.CORNFLOWER_BLUE
+@export var marker_material_neutral : BugMarkerMaterialPack
-const UNRESOLVED_COLOUR = Color(0.1, 0.0, 0.0)
+@export var marker_material_unresolved : BugMarkerMaterialPack
-const IN_PROGRESS_COLOUR = Color(0.5, 0.5, 0.0)
+@export var marker_material_in_progress : BugMarkerMaterialPack
-const RESOLVED_COLOUR = Color(0.0, 1.0, 0.0)
+@export var marker_material_resolved : BugMarkerMaterialPack
 
+@export_group("")
 @export var enable_info : bool = true : set = set_info_enabled
 
 @onready var __arrow : MeshInstance3D = $Arrow as MeshInstance3D
 @onready var __billboard : MeshInstance3D = $Billboard as MeshInstance3D
 @onready var __info_collider : Area3D = $Billboard/Info as Area3D
-var __arrow_material : ShaderMaterial
-var __billboard_material : ShaderMaterial
 
 
 func _ready() -> void:
-	__arrow_material = __arrow.mesh.surface_get_material(0) as ShaderMaterial
-	__billboard_material = __billboard.mesh.surface_get_material(0) as ShaderMaterial
 	set_info_enabled(enable_info)
 	__set_marker_status(marker_status)
 
@@ -35,19 +33,18 @@ func set_info_enabled(_enable:bool):
 
 
 func __set_marker_status(_status:BugStatus) -> void:
-	if __arrow_material and __billboard_material:
 	match _status:
 		BugStatus.NEUTRAL:
-				__arrow_material.set_shader_parameter("colour", NEUTRAL_COLOUR)
+			__arrow.set_surface_override_material(0, marker_material_neutral.arrow)
-				__billboard_material.set_shader_parameter("colour", NEUTRAL_COLOUR)
+			__billboard.set_surface_override_material(0, marker_material_neutral.icon)
 		BugStatus.UNRESOLVED:
-				__arrow_material.set_shader_parameter("colour", UNRESOLVED_COLOUR)
+			__arrow.set_surface_override_material(0, marker_material_unresolved.arrow)
-				__billboard_material.set_shader_parameter("colour", UNRESOLVED_COLOUR)
+			__billboard.set_surface_override_material(0, marker_material_unresolved.icon)
 		BugStatus.IN_PROGRESS:
-				__arrow_material.set_shader_parameter("colour", IN_PROGRESS_COLOUR)
+			__arrow.set_surface_override_material(0, marker_material_in_progress.arrow)
-				__billboard_material.set_shader_parameter("colour", IN_PROGRESS_COLOUR)
+			__billboard.set_surface_override_material(0, marker_material_in_progress.icon)
 		BugStatus.RESOLVED:
-				__arrow_material.set_shader_parameter("colour", RESOLVED_COLOUR)
+			__arrow.set_surface_override_material(0, marker_material_resolved.arrow)
-				__billboard_material.set_shader_parameter("colour", RESOLVED_COLOUR)
+			__billboard.set_surface_override_material(0, marker_material_resolved.icon)
 	
 	marker_status = _status

Scenes/bug_marker.tscn

@@ -1,11 +1,13 @@
-[gd_scene load_steps=6 format=3 uid="uid://crr6cjploetps"]
+[gd_scene load_steps=9 format=3 uid="uid://crr6cjploetps"]
 
 [ext_resource type="Script" path="res://addons/Bugbot/Scenes/bug_marker.gd" id="1_1adfi"]
 [ext_resource type="ArrayMesh" uid="uid://dtvea38mlpfla" path="res://addons/Bugbot/Meshes/arrow.res" id="1_65xos"]
-[ext_resource type="Material" uid="uid://dkaq0ok73o5d4" path="res://addons/Bugbot/Materials/bug_marker_icon.material" id="3_px2dp"]
+[ext_resource type="Resource" uid="uid://br7bd80u7vyid" path="res://addons/Bugbot/Materials/BugMarker/bug_marker_neutral.res" id="2_uwubq"]
+[ext_resource type="Resource" uid="uid://dgsi0x8bj0twj" path="res://addons/Bugbot/Materials/BugMarker/bug_marker_unresolved.res" id="3_slhi1"]
+[ext_resource type="Resource" uid="uid://qeog5ye8d64o" path="res://addons/Bugbot/Materials/BugMarker/bug_marker_in_progress.res" id="4_jrygt"]
+[ext_resource type="Resource" uid="uid://bpog70fji227f" path="res://addons/Bugbot/Materials/BugMarker/bug_marker_resolved.res" id="5_yhhan"]
 
 [sub_resource type="QuadMesh" id="QuadMesh_dd1nc"]
-material = ExtResource("3_px2dp")
 custom_aabb = AABB(-0.25, -0.25, -0.25, 0.5, 0.5, 0.5)
 size = Vector2(0.25, 0.25)
 
@@ -14,6 +16,10 @@ radius = 0.125398
 
 [node name="BugMarker" type="Node3D"]
 script = ExtResource("1_1adfi")
+marker_material_neutral = ExtResource("2_uwubq")
+marker_material_unresolved = ExtResource("3_slhi1")
+marker_material_in_progress = ExtResource("4_jrygt")
+marker_material_resolved = ExtResource("5_yhhan")
 
 [node name="Arrow" type="MeshInstance3D" parent="."]
 cast_shadow = 0