Added Noise based island generator.

materials/IslandColorRampShader.tres

@@ -0,0 +1,59 @@
+[gd_resource type="ShaderMaterial" load_steps=2 format=2]
+
+[sub_resource type="Shader" id=1]
+code = "shader_type canvas_item;
+render_mode skip_vertex_transform;
+
+void vertex() {
+    VERTEX = (WORLD_MATRIX * (EXTRA_MATRIX * vec4(VERTEX, 0.0, 1.0))).xy;
+}
+
+vec3 color_ramp(float h) {
+	if (h < 0.4f) {
+		return vec3(0, 0, 0.6);
+	} else if (h < 0.45f) {
+		return vec3(0, 0, 0.7);
+	} else if (h < 0.5f) {
+		return vec3(0, 0, 1);
+	} else if (h < 0.55){
+		return vec3(0.8, 0.8, 0.1);
+	} else if (h < 0.6){
+		return vec3(0, 0.6, 0);
+	} else if (h < 0.68){
+		return vec3(0, 0.4, 0);
+	} else if (h <= 0.78){
+		return vec3(0.6, 0.6, 0.6);
+	} else if (h < 1.0){
+		return vec3(0.8, 0.8, 0.8);
+	}
+	
+	return vec3(1.0);
+}
+
+vec3 rgbToGrayscale(vec3 color) {
+	return vec3(dot(color.rgb, vec3(0.299, 0.587, 0.144)));
+}
+
+float borderFalloff(vec2 uv) {
+	return min(
+		(0.5 - abs(-uv.x + 0.5)) * 2.0,
+		(0.5 - abs(-uv.y + 0.5)) * 2.0);
+}
+
+float borderFalloffCircle(vec2 uv) {
+	return (0.5 - length(vec2(uv - vec2(0.5, 0.5)))) * 2.0;
+}
+
+void fragment() {
+	vec4 texture_color = texture(TEXTURE, UV);
+
+	
+	COLOR.rgb = vec3(abs(UV.x - 0.5) * 2.0);
+	//COLOR.rgb = color_ramp(texture_color.r * borderFalloffCircle(UV) * 1.8);
+	COLOR.rgb = color_ramp(texture_color.r * borderFalloff(UV) * 1.8);
+}
+
+"
+
+[resource]
+shader = SubResource( 1 )

scenes/NoiseWorldGeneration2D.tscn

@@ -0,0 +1,88 @@
+[gd_scene load_steps=5 format=2]
+
+[sub_resource type="Shader" id=1]
+code = "shader_type canvas_item;
+render_mode skip_vertex_transform;
+
+void vertex() {
+    VERTEX = (WORLD_MATRIX * (EXTRA_MATRIX * vec4(VERTEX, 0.0, 1.0))).xy;
+}
+
+vec3 color_ramp(float h) {
+	if (h < 0.4f) {
+		return vec3(0, 0, 0.6);
+	} else if (h < 0.45f) {
+		return vec3(0, 0, 0.7);
+	} else if (h < 0.5f) {
+		return vec3(0, 0, 1);
+	} else if (h < 0.55){
+		return vec3(0.8, 0.8, 0.1);
+	} else if (h < 0.6){
+		return vec3(0, 0.6, 0);
+	} else if (h < 0.68){
+		return vec3(0, 0.4, 0);
+	} else if (h <= 0.78){
+		return vec3(0.6, 0.6, 0.6);
+	} else if (h < 1.0){
+		return vec3(0.8, 0.8, 0.8);
+	}
+	
+	return vec3(1.0);
+}
+
+vec3 rgbToGrayscale(vec3 color) {
+	return vec3(dot(color.rgb, vec3(0.299, 0.587, 0.144)));
+}
+
+float borderFalloff(vec2 uv) {
+	return min(
+		(0.5 - abs(-uv.x + 0.5)) * 2.0,
+		(0.5 - abs(-uv.y + 0.5)) * 2.0);
+}
+
+float borderFalloffCircle(vec2 uv) {
+	return (0.5 - length(vec2(uv - vec2(0.5, 0.5)))) * 2.0;
+}
+
+void fragment() {
+	vec4 texture_color = texture(TEXTURE, UV);
+
+	
+	COLOR.rgb = vec3(abs(UV.x - 0.5) * 2.0);
+	//COLOR.rgb = color_ramp(texture_color.r * borderFalloffCircle(UV) * 1.8);
+	COLOR.rgb = color_ramp(texture_color.r * borderFalloff(UV) * 1.8);
+}
+
+"
+
+[sub_resource type="ShaderMaterial" id=2]
+shader = SubResource( 1 )
+
+[sub_resource type="OpenSimplexNoise" id=3]
+seed = 57
+octaves = 5
+period = 20.0
+persistence = 0.2
+lacunarity = 4.0
+
+[sub_resource type="NoiseTexture" id=4]
+width = 128
+height = 128
+seamless = true
+noise = SubResource( 3 )
+noise_offset = Vector2( 2.632, 0 )
+
+[node name="Node2D" type="Node2D"]
+
+[node name="GridContainer" type="GridContainer" parent="."]
+margin_right = 861.0
+margin_bottom = 595.0
+
+[node name="TextureRect" type="TextureRect" parent="GridContainer"]
+material = SubResource( 2 )
+margin_right = 861.0
+margin_bottom = 595.0
+size_flags_horizontal = 3
+size_flags_vertical = 3
+texture = SubResource( 4 )
+expand = true

scenes/TileWorld.tscn

@@ -0,0 +1,28 @@
+[gd_scene load_steps=4 format=2]
+
+[ext_resource path="res://scenes/TileWorld.cs" type="Script" id=1]
+[ext_resource path="res://icon.png" type="Texture" id=2]
+[ext_resource path="res://materials/IslandColorRampShader.tres" type="Material" id=3]
+
+[node name="TileWorld" type="Spatial"]
+script = ExtResource( 1 )
+
+[node name="DirectionalLight" type="DirectionalLight" parent="."]
+transform = Transform( 0.328059, -0.878387, 0.347583, 0, 0.367946, 0.929847, -0.944657, -0.305045, 0.120708, 0, 6.59293, 1.20265 )
+shadow_enabled = true
+directional_shadow_mode = 0
+
+[node name="OffscreenViewport" type="Viewport" parent="."]
+size = Vector2( 100, 100 )
+own_world = true
+handle_input_locally = false
+hdr = false
+usage = 0
+render_target_v_flip = true
+render_target_update_mode = 3
+
+[node name="TextureRect" type="TextureRect" parent="OffscreenViewport"]
+material = ExtResource( 3 )
+margin_right = 40.0
+margin_bottom = 40.0
+texture = ExtResource( 2 )