separate collision layers

project.godot

@@ -82,3 +82,10 @@ toggle_camera_navigation={
 "events": [Object(InputEventKey,"resource_local_to_scene":false,"resource_name":"","device":-1,"window_id":0,"alt_pressed":false,"shift_pressed":false,"ctrl_pressed":false,"meta_pressed":false,"pressed":false,"keycode":0,"physical_keycode":4194333,"key_label":0,"unicode":0,"location":0,"echo":false,"script":null)
 ]
 }
+
+[layer_names]
+
+3d_physics/layer_1="default"
+3d_physics/layer_2="units"
+3d_physics/layer_3="controlled_units"
+3d_physics/layer_9="items"

scenes/items/honeydew.tscn

@@ -8,6 +8,7 @@
 radius = 0.213583
 
 [node name="Honeydew" type="CharacterBody3D"]
+collision_layer = 256
 collision_mask = 0
 script = ExtResource("1_6fg3d")
 

scenes/structures/Anthill.tscn

@@ -8,6 +8,7 @@
 [sub_resource type="BoxShape3D" id="BoxShape3D_ruupa"]
 
 [node name="Anthill" type="CharacterBody3D"]
+collision_mask = 0
 script = ExtResource("1_8k02d")
 
 [node name="MeshInstance3D" type="MeshInstance3D" parent="."]

scenes/units/ant_gatherer.tscn

@@ -32,6 +32,7 @@ transitions = ["Start", "locomotion", SubResource("AnimationNodeStateMachineTran
 radius = 0.25
 
 [node name="AntGatherer" instance=ExtResource("1_asokb")]
+collision_layer = 4
 collision_mask = 0
 script = ExtResource("2_vcqni")
 

scenes/units/ant_nitwit.tscn

@@ -32,6 +32,7 @@ transitions = ["Start", "locomotion", SubResource("AnimationNodeStateMachineTran
 radius = 0.25
 
 [node name="AntNitwit" instance=ExtResource("1_1u65s")]
+collision_layer = 4
 collision_mask = 0
 script = ExtResource("2_f1bdv")
 

scenes/units/aphid.tscn

@@ -31,6 +31,8 @@ transitions = ["Start", "locomotion", SubResource("AnimationNodeStateMachineTran
 radius = 0.25
 
 [node name="Aphid" instance=ExtResource("1_cchbm")]
+collision_layer = 2
+collision_mask = 0
 script = ExtResource("2_ohs5l")
 
 [node name="aphid" parent="." index="0"]

scripts/globals/selection_manager.gd

@@ -33,6 +33,8 @@ func _ready() -> void:
 	frustrum_area.body_entered.connect(_on_frustrum_area_body_entered)
 	frustrum_area.body_exited.connect(_on_frustrum_area_body_exited)
 	frustrum_area.input_ray_pickable = false
+	frustrum_area.set_collision_mask_value(1, false)
+	frustrum_area.set_collision_mask_value(3, true)
 	rect_panel.mouse_filter = Control.MOUSE_FILTER_IGNORE
 	rect_panel.add_theme_stylebox_override("panel", rect_style)
 	add_child(rect_panel)