Add initial stylized water shader

world/materials/stylized_water.gdshader

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+shader_type spatial;
+render_mode cull_back, diffuse_burley, specular_schlick_ggx;
+
+uniform vec4 deep_color : source_color = vec4(0.055, 0.31, 0.50, 1.0);
+uniform vec4 wave_color : source_color = vec4(0.18, 0.59, 0.74, 1.0);
+uniform vec4 highlight_color : source_color = vec4(0.64, 0.88, 0.93, 1.0);
+
+uniform float primary_wave_scale : hint_range(0.01, 2.0, 0.01) = 0.52;
+uniform float secondary_wave_scale : hint_range(0.01, 2.0, 0.01) = 0.29;
+uniform vec2 primary_speed = vec2(0.16, 0.07);
+uniform vec2 secondary_speed = vec2(-0.08, 0.12);
+uniform float wave_strength : hint_range(0.0, 1.0, 0.01) = 0.42;
+
+uniform float highlight_fresnel_strength : hint_range(0.0, 1.0, 0.01) = 0.22;
+uniform float fresnel_power : hint_range(0.5, 12.0, 0.1) = 4.0;
+uniform float roughness : hint_range(0.0, 1.0, 0.01) = 0.32;
+uniform float specular_strength : hint_range(0.0, 1.0, 0.01) = 0.28;
+
+varying vec3 world_position;
+
+
+void vertex() {
+	world_position = (MODEL_MATRIX * vec4(VERTEX, 1.0)).xyz;
+}
+
+
+void fragment() {
+	const vec2 primary_direction = vec2(0.835, 0.550);
+	const vec2 secondary_direction = vec2(-0.485, 0.875);
+
+	vec2 primary_coordinates = (
+		world_position.xz * primary_wave_scale
+		+ TIME * primary_speed
+	);
+	vec2 secondary_coordinates = (
+		world_position.xz * secondary_wave_scale
+		+ TIME * secondary_speed
+	);
+	float primary_phase = dot(primary_coordinates, primary_direction);
+	float secondary_phase = dot(
+		secondary_coordinates,
+		secondary_direction
+	);
+	float primary_wave = sin(primary_phase);
+	float secondary_wave = sin(secondary_phase);
+	float combined_wave = (
+		primary_wave * 0.62
+		+ secondary_wave * 0.38
+	);
+	float wave_band = smoothstep(
+		0.34,
+		0.66,
+		combined_wave * 0.5 + 0.5
+	);
+
+	vec2 wave_slope = (
+		cos(primary_phase)
+		* primary_direction
+		* primary_wave_scale
+		* 0.62
+		+ cos(secondary_phase)
+		* secondary_direction
+		* secondary_wave_scale
+		* 0.38
+	);
+	vec3 world_normal = normalize(
+		vec3(
+			-wave_slope.x * wave_strength * 0.34,
+			1.0,
+			-wave_slope.y * wave_strength * 0.34
+		)
+	);
+	NORMAL = normalize(
+		(VIEW_MATRIX * vec4(world_normal, 0.0)).xyz
+	);
+
+	float fresnel = pow(
+		1.0 - clamp(dot(NORMAL, VIEW), 0.0, 1.0),
+		fresnel_power
+	);
+	vec3 water_color = mix(
+		deep_color.rgb,
+		wave_color.rgb,
+		wave_band * wave_strength
+	);
+	ALBEDO = mix(
+		water_color,
+		highlight_color.rgb,
+		fresnel * highlight_fresnel_strength
+	);
+	ROUGHNESS = roughness;
+	SPECULAR = specular_strength;
+}

world/materials/stylized_water.gdshader.uid

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+uid://lvo7xyr3c1k3

world/materials/stylized_water.tres

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+[gd_resource type="ShaderMaterial" load_steps=2 format=3]
+
+[ext_resource type="Shader" path="res://world/materials/stylized_water.gdshader" id="1_water_shader"]
+
+[resource]
+render_priority = 0
+shader = ExtResource("1_water_shader")