feat: implement water shader and environment for free mode arena

scenes/arena/freemode.tscn

@@ -1,8 +1,41 @@
 [gd_scene format=3 uid="uid://nwpaqt6drdkr"]
 
 [ext_resource type="PackedScene" uid="uid://b1l0x4yf3lbx8" path="res://assets/models/arena/free_mode/Terrainv2.gltf" id="1_37t6b"]
+[ext_resource type="Material" uid="uid://xifgjdr8285d" path="res://assets/models/arena/free_mode/water_shader.tres" id="2_bw67x"]
+[ext_resource type="Texture2D" uid="uid://dep1ng3aqb2jw" path="res://assets/models/arena/free_mode/sky_sea_01.png" id="3_8esiu"]
+
+[sub_resource type="PlaneMesh" id="PlaneMesh_8esiu"]
+material = ExtResource("2_bw67x")
+
+[sub_resource type="PanoramaSkyMaterial" id="PanoramaSkyMaterial_xj13a"]
+panorama = ExtResource("3_8esiu")
+
+[sub_resource type="Sky" id="Sky_p4wg4"]
+sky_material = SubResource("PanoramaSkyMaterial_xj13a")
+
+[sub_resource type="Environment" id="Environment_8v6kw"]
+background_mode = 2
+sky = SubResource("Sky_p4wg4")
+ambient_light_source = 3
+ambient_light_color = Color(1, 1, 1, 1)
+ambient_light_sky_contribution = 0.5
+reflected_light_source = 2
 
 [node name="Freemode" type="Node3D" unique_id=355029811]
 transform = Transform3D(100, 0, 0, 0, 100, 0, 0, 0, 100, 10.565, -0.57, 8.139)
 
 [node name="Terrainv2" parent="." unique_id=1519605696 instance=ExtResource("1_37t6b")]
+
+[node name="Water" type="MeshInstance3D" parent="." unique_id=289309951]
+transform = Transform3D(1, 0, 0, 0, 1, 0, 0, 0, 1, 0, -0.14561673, 0)
+mesh = SubResource("PlaneMesh_8esiu")
+
+[node name="DirectionalLight3D" type="DirectionalLight3D" parent="." unique_id=831804132]
+transform = Transform3D(0.23387258, -0.9458177, 0.2252387, -0.400554, 0.11736052, 0.90872604, -0.88592327, -0.30274636, -0.35140368, 0.1, 0.1, 0.13)
+light_color = Color(0.98039216, 0.83137256, 0.70980394, 1)
+shadow_enabled = true
+shadow_bias = 0.2
+shadow_normal_bias = 5.0
+
+[node name="WorldEnvironment" type="WorldEnvironment" parent="." unique_id=936572897]
+environment = SubResource("Environment_8v6kw")

scenes/main.gd

@@ -123,19 +123,11 @@ func _apply_arena_background():
 		"Stop N Go Arena":
 			texture_path = "res://assets/graphics/level_bg/placeholder_stop_n_go.jpg"
 			_instantiate_3d_arena("res://scenes/arena/stop_n_go.scn")
-			
-			# Make normal, non-walkable, and Tekton floors invisible 
-			# by shrinking their scale to 0. This hides them visually while 
-			# avoiding "Parameter 'mesh' is null" or material override errors.
-			var em = $EnhancedGridMap
-			if em and em.mesh_library:
-				var ml = em.mesh_library.duplicate()
-				for id in [0, 4, 6]:
-					# Scale to 0 to hide it without triggering invalid mesh errors
-					ml.set_item_mesh_transform(id, Transform3D().scaled(Vector3.ZERO))
-				
-				em.mesh_library = ml
-				print("[Main] Hide tiles 0, 4, 6 via zero-scale transform.")
+			_hide_ground_tiles()
+		"Freemode Arena":
+			texture_path = "res://assets/graphics/level_bg/placeholder_classic.jpg" # Fallback texture
+			_instantiate_3d_arena("res://scenes/arena/freemode.tscn")
+			_hide_ground_tiles()
 		"Tekton Doors Arena":
 			texture_path = "res://assets/graphics/level_bg/placeholder_tekton_doors.jpg"
 		"Classic", _:
@@ -159,6 +151,20 @@ func _instantiate_3d_arena(scene_path: String):
 			move_child(arena_instance, 0)
 			print("Instantiated 3D Arena: ", scene_path)
 
+func _hide_ground_tiles():
+	# Make normal, non-walkable, and Tekton floors invisible 
+	# by shrinking their scale to 0. This hides them visually while 
+	# avoiding "Parameter 'mesh' is null" or material override errors.
+	var em = $EnhancedGridMap
+	if em and em.mesh_library:
+		var ml = em.mesh_library.duplicate()
+		for id in [0, 4, 6]:
+			# Scale to 0 to hide it without triggering invalid mesh errors
+			ml.set_item_mesh_transform(id, Transform3D().scaled(Vector3.ZERO))
+		
+		em.mesh_library = ml
+		print("[Main] Hide tiles 0, 4, 6 via zero-scale transform.")
+
 @rpc("any_peer", "call_local", "reliable")
 func sync_portal_configs(configs: Array):
 	if portal_mode_manager:
@@ -849,11 +855,10 @@ func _assign_random_spawn_positions():
 				var pos = Vector2i(x, z)
 				
 				# SAFETY CHECK: Is this reserved for a Static Tekton Stand?
-				# Stand clears 3x3, we use a strictly >= 1 check (so abs <= 1 is EXACTLY the 3x3 stand)
-				# Let's use a 3x3 check (1 radius) to avoid strictly the stand itself, plus 1 buffer = radius 2.
+				# Stand clears exactly 3x3 area
 				var is_safe = true
 				for reserved in reserved_static_positions:
-					if abs(x - reserved.x) <= 2 and abs(z - reserved.y) <= 2:
+					if abs(x - reserved.x) <= 1 and abs(z - reserved.y) <= 1:
 						is_safe = false
 						break
 				

scenes/player.gd

@@ -1345,18 +1345,17 @@ func is_position_occupied(pos: Vector2i) -> bool:
 		if p.is_player_moving and p.target_position == pos:
 			return true
 			
-	# Prevent overlap with Static Tekton Stands (3x3 area, with 1-tile buffer = 5x5 checked)
+	# Prevent overlap with Static Tekton Stands (Exactly the 3x3 area)
 	if enhanced_gridmap:
 		for stand in get_tree().get_nodes_in_group("StaticTektonStands"):
 			var local_pos = enhanced_gridmap.to_local(stand.global_position)
 			var stand_map_pos = enhanced_gridmap.local_to_map(local_pos)
-			if abs(pos.x - stand_map_pos.x) <= 2 and abs(pos.y - stand_map_pos.z) <= 2:
+			if abs(pos.x - stand_map_pos.x) <= 1 and abs(pos.y - stand_map_pos.z) <= 1:
 				return true
 				
-		var main_node = get_tree().get_root().get_node_or_null("Main")
 		if main_node and "reserved_static_positions" in main_node:
 			for reserved in main_node.reserved_static_positions:
-				if abs(pos.x - reserved.x) <= 2 and abs(pos.y - reserved.y) <= 2:
+				if abs(pos.x - reserved.x) <= 1 and abs(pos.y - reserved.y) <= 1:
 					return true
 				
 	return false

scenes/player.tscn

@@ -167,6 +167,8 @@ transform = Transform3D(1.2, 0, 0, 0, -5.2453668e-08, -1.2, 0, 1.2, -5.2453668e-
 visible = false
 sprite_frames = ExtResource("10_y4r1p")
 animation = &"floor_spawn_bot"
+frame = 35
+frame_progress = 1.0
 
 [node name="receiver_skill_stunned" type="AnimatedSprite3D" parent="." unique_id=56953581]
 transform = Transform3D(0.5, 0, 0, 0, -2.1855694e-08, -0.5, 0, 0.5, -2.1855694e-08, 0, 1.5653763, 0)