Adds bushes and flowers to ground tiles

Implements bush and flower spawning on ground tiles based on vegetation density.
Adds new assets for bushes and flowers, and introduces multi-mesh rendering for optimized performance.
Introduces seasonal color variations for vegetation using a shader for bushes and materials for flowers and grass.
Refactors material application into a MaterialManager to handle material assignments over multiple frames.
Moves ground tile scripts into a subfolder.
Adds floating particles to test scene.

stages/Test3D/Test3d.tscn

@@ -1,10 +1,11 @@
-[gd_scene load_steps=45 format=4 uid="uid://bwsugg4p50fjr"]
+[gd_scene load_steps=46 format=4 uid="uid://bwsugg4p50fjr"]
 
 [ext_resource type="Environment" uid="uid://cm77bbr0io118" path="res://Stages/Test3D/new_environment.tres" id="1_8ph61"]
 [ext_resource type="Script" uid="uid://bwed2dwogfmxv" path="res://Entities/Player/scripts/player.gd" id="1_d602n"]
 [ext_resource type="AnimationLibrary" uid="uid://bwnn7vpd0dqds" path="res://Common/animations/basic-movement.res" id="1_tfa5t"]
 [ext_resource type="Script" uid="uid://bbjv6a7yg7m02" path="res://Stages/Test3D/camera_pivot.gd" id="2_sdmks"]
 [ext_resource type="Shader" uid="uid://bsemnmdracd4m" path="res://Common/shaders/outline.gdshader" id="4_feu7y"]
+[ext_resource type="Script" uid="uid://bjco8musjqog4" path="res://Stages/Test3D/particles.gd" id="9_oiyue"]
 [ext_resource type="Texture2D" uid="uid://c78jcjh8fjndd" path="res://Stages/Test3D/assets/3d/particles/flamelet_smooth.png" id="21_xvexm"]
 [ext_resource type="Script" uid="uid://dglvt140rhg00" path="res://Stages/Test3D/omni_light_3d.gd" id="22_ukp6m"]
 [ext_resource type="PackedScene" uid="uid://mdxkaqaoybjv" path="res://Stages/Test3D/assets/tent-canvas.glb" id="23_5r2bu"]
@@ -737,11 +738,11 @@ transform = Transform3D(0.707107, -0.408607, 0.577096, 0, 0.816138, 0.577857, -0
 script = ExtResource("2_sdmks")
 
 [node name="Camera3D" type="Camera3D" parent="SubViewportContainer/SubViewport/Player/CameraPivot"]
-transform = Transform3D(1, 0, 0, 0, 1, -1.49012e-07, 0, 1.19209e-07, 1, 0.0410548, 0.237644, 3.45114)
+transform = Transform3D(1, 0, 0, 0, 1, 1.78814e-07, 0, -3.27826e-07, 1, 0, 0, 7)
 projection = 1
 current = true
 size = 3.0
-near = 0.005
+near = 0.001
 far = 100.0
 
 [node name="PostProcessing" type="MeshInstance3D" parent="SubViewportContainer/SubViewport/Player/CameraPivot/Camera3D"]
@@ -759,10 +760,10 @@ mesh = SubResource("QuadMesh_tfa5t")
 shape = SubResource("BoxShape3D_tfa5t")
 
 [node name="VFX" type="Node3D" parent="SubViewportContainer/SubViewport"]
-visible = false
 
 [node name="Fire" type="GPUParticles3D" parent="SubViewportContainer/SubViewport/VFX"]
 transform = Transform3D(1, 0, 0, 0, 1, 0, 0, 0, 1, 1.08083, 0.0837402, 0.501403)
+visible = false
 amount = 50
 lifetime = 0.4
 speed_scale = 0.4
@@ -772,7 +773,7 @@ draw_pass_1 = SubResource("QuadMesh_hvb1l")
 [node name="OmniLight3D" type="OmniLight3D" parent="SubViewportContainer/SubViewport/VFX/Fire"]
 transform = Transform3D(1, 0, 0, 0, 1, 0, 0, 0, 1, -0.000509977, 0.121094, -0.00151992)
 light_color = Color(0.89, 0.461613, 0.2136, 1)
-light_energy = 0.802091
+light_energy = 0.590552
 light_indirect_energy = 1.084
 light_volumetric_fog_energy = 3.764
 light_size = 0.105
@@ -794,6 +795,9 @@ trail_lifetime = 0.1
 process_material = SubResource("ParticleProcessMaterial_p5fn2")
 draw_pass_1 = SubResource("RibbonTrailMesh_5r2bu")
 
+[node name="FloatingParticles" type="GPUParticles3D" parent="SubViewportContainer/SubViewport/VFX"]
+script = ExtResource("9_oiyue")
+
 [node name="TileGround" type="Node3D" parent="SubViewportContainer/SubViewport"]
 unique_name_in_owner = true
 script = ExtResource("24_vyi1v")

stages/Test3D/new_environment.tres

@@ -2,7 +2,6 @@
 
 [sub_resource type="ProceduralSkyMaterial" id="ProceduralSkyMaterial_lg8b7"]
 sky_horizon_color = Color(0.67451, 0.682353, 0.698039, 1)
-sky_curve = 0.0175
 ground_bottom_color = Color(1, 1, 1, 1)
 ground_curve = 0.171484
 
@@ -10,7 +9,7 @@ ground_curve = 0.171484
 sky_material = SubResource("ProceduralSkyMaterial_lg8b7")
 
 [resource]
-background_mode = 1
+background_mode = 2
 background_color = Color(0.752941, 0.776471, 0.827451, 1)
 sky = SubResource("Sky_7bk1c")
 ambient_light_source = 2
@@ -18,12 +17,12 @@ ambient_light_color = Color(0.662745, 0.694118, 0.772549, 1)
 ambient_light_energy = 0.5
 reflected_light_source = 2
 tonemap_mode = 2
-ssao_enabled = true
-ssao_radius = 0.3
-ssao_intensity = 0.5
-ssao_power = 15.0
 ssil_enabled = true
+sdfgi_use_occlusion = true
 glow_levels/2 = 0.6
 glow_levels/3 = 0.6
 glow_levels/5 = 0.0
 glow_intensity = 2.0
+fog_density = 0.0635
+volumetric_fog_emission = Color(0.821925, 0.333878, 0.419207, 1)
+volumetric_fog_ambient_inject = 16.0

stages/Test3D/particles.gd

@@ -0,0 +1,79 @@
+extends GPUParticles3D
+
+@onready var player: Node3D = get_node("%Player")
+var last_player_position: Vector3
+var update_distance: float = 1
+
+func _ready():
+	setup_floating_particles()
+
+func _process(delta):
+	if player:
+		var current_player_pos = player.global_position
+
+		var target_pos = Vector3(
+			current_player_pos.x,
+			1.0,
+			current_player_pos.z
+		)
+
+		global_position = global_position.lerp(target_pos, delta * 3.0)
+
+func setup_floating_particles():
+	# Basic particle setup
+	emitting = true
+	amount = 100
+	lifetime = 8.0
+	visibility_aabb = AABB(Vector3(-20, 0, -20), Vector3(40, 10, 40))
+	
+	# Create material
+	var material = ParticleProcessMaterial.new()
+	
+	# Emission
+	material.emission_shape = ParticleProcessMaterial.EMISSION_SHAPE_BOX
+	material.emission_box_extents = Vector3(5, 2, 5)
+	
+	# Movement
+	material.direction = Vector3(0.1, 0.8, 0.1)
+	material.initial_velocity_min = 0.2
+	material.initial_velocity_max = 0.8
+	material.gravity = Vector3(0, -0.3, 0)
+	
+	# Floating motion
+	material.orbit_velocity_min = 0.1
+	material.orbit_velocity_max = 0.3
+	material.radial_velocity_min = -0.2
+	material.radial_velocity_max = 0.2
+	
+	# Size and fade
+	material.scale_min = 0.01
+	material.scale_max = 0.03
+	material.scale_over_velocity_min = 0.0
+	material.scale_over_velocity_max = 2.0
+	
+	# Color (golden dust particles)
+	var gradient = Gradient.new()
+	gradient.add_point(0.0, Color(1.0, 0.9, 0.6, 0.0)) # Fade in
+	gradient.add_point(0.2, Color(1.0, 0.9, 0.6, 0.5)) # Full opacity
+	gradient.add_point(0.8, Color(1.0, 0.8, 0.4, 0.3)) # Slight color shift
+	gradient.add_point(1.0, Color(1.0, 0.7, 0.3, 0.0)) # Fade out
+	
+	var gradient_texture = GradientTexture1D.new()
+	gradient_texture.gradient = gradient
+	material.color_ramp = gradient_texture
+	
+	# Assign the material to the particle system
+	process_material = material
+	
+	# Create and assign visual mesh (small billboard)
+	var quad_mesh = QuadMesh.new()
+	quad_mesh.size = Vector2(0.01, 0.01)
+	draw_pass_1 = quad_mesh
+	
+	# Create a basic material for the particles to be visible
+	var particle_material = StandardMaterial3D.new()
+	particle_material.albedo_color = ColorData.grass_materials[Season.current]['top']
+	particle_material.flags_transparent = true
+	particle_material.flags_unshaded = true
+	particle_material.billboard_mode = BaseMaterial3D.BILLBOARD_ENABLED
+	material_override = particle_material

stages/Test3D/particles.gd.uid

@@ -0,0 +1 @@
+uid://bjco8musjqog4