feat(renderer): add moonlight and smooth day/night light blending

Implement Percentage Closer Soft Shadows (PCSS) as shadow mode 3.
Add a FindBlocker function and three Poisson disk arrays (8, 16, 32 samples).
Expose new uniforms (lightSizeUV, minRadius, maxRadius, samples) and provide
slider/combo controls in the dev panel for sample count, light size, and penumbra radius limits.

assets/data/block/air.toml

@@ -7,4 +7,5 @@ is_liquid = false
 is_passable = true
 is_transitional = false
 is_transparent = true
-name = 'air'
+name = 'air'
+roughness = 1.0

assets/data/block/dirt.toml

@@ -7,4 +7,5 @@ is_liquid = false
 is_passable = false
 is_transitional = true
 is_transparent = false
-name = 'dirt'
+name = 'dirt'
+roughness = 1.0

assets/data/block/grass.toml

@@ -7,4 +7,5 @@ is_liquid = false
 is_passable = true
 is_transitional = false
 is_transparent = true
-name = 'grass'
+name = 'grass'
+roughness = 0.9

assets/data/block/grass_block.toml

@@ -7,4 +7,5 @@ is_liquid = false
 is_passable = false
 is_transitional = true
 is_transparent = false
-name = 'grass_block'
+name = 'grass_block'
+roughness = 0.9

assets/data/block/leaf.toml

@@ -7,4 +7,5 @@ is_liquid = false
 is_passable = false
 is_transitional = false
 is_transparent = true
-name = 'leaf'
+name = 'leaf'
+roughness = 0.7

assets/data/block/log.toml

@@ -7,4 +7,5 @@ is_liquid = false
 is_passable = false
 is_transitional = false
 is_transparent = false
-name = 'log'
+name = 'log'
+roughness = 0.7

assets/data/block/sand.toml

@@ -7,4 +7,5 @@ is_liquid = false
 is_passable = false
 is_transitional = true
 is_transparent = false
-name = 'sand'
+name = 'sand'
+roughness = 0.8

assets/data/block/snowy_grass_block.toml

@@ -7,4 +7,5 @@ is_liquid = false
 is_passable = false
 is_transitional = true
 is_transparent = false
-name = 'snowy_grass_block'
+name = 'snowy_grass_block'
+roughness = 0.9

assets/data/block/stone.toml

@@ -7,4 +7,5 @@ is_liquid = false
 is_passable = false
 is_transitional = true
 is_transparent = false
-name = 'stone'
+name = 'stone'
+roughness = 0.75

assets/data/block/template.toml

@@ -8,3 +8,4 @@ is_transparent = false
 is_discard = false
 is_blend = false
 is_transitional = false
+roughness = 1.0

assets/data/block/water.toml

@@ -7,4 +7,5 @@ is_liquid = true
 is_passable = true
 is_transitional = false
 is_transparent = true
-name = 'water'
+name = 'water'
+roughness = 0.02

assets/shaders/block_f_shader.glsl

@@ -4,6 +4,7 @@ in vec2 tc;
 in vec3 normal;
 in vec3 vert_pos;
 in vec4 FragPosLightSpace;
+in float roughness;
 flat in int tex_layer;
 out vec4 color;
 layout (binding = 0) uniform sampler2D shadowMap;
@@ -11,21 +12,123 @@ layout (binding = 1) uniform sampler2DArray samp;
 
 uniform float ambientStrength;
 uniform vec3 sunlightColor;
+uniform vec3 ambientColor;
 uniform vec3 sunlightDir;
+uniform vec3 cameraPos;
 uniform bool shader_on;
 uniform int shadowMode;
+uniform float specularStrength;
+uniform float lightSizeUV; 
+uniform float minRadius;
+uniform float maxRadius;
+const vec2 poissonDisk32[32] = vec2[](
+    vec2(-0.975402, -0.071138),
+    vec2(-0.920347, -0.411420),
+    vec2(-0.883908,  0.217872),
+    vec2(-0.815442, -0.879125),
+    vec2(-0.775043,  0.543896),
+    vec2(-0.698126, -0.227570),
+    vec2(-0.682433,  0.801894),
+    vec2(-0.563905,  0.021517),
+    vec2(-0.443233, -0.975116),
+    vec2(-0.412231,  0.361307),
+    vec2(-0.264969, -0.418930),
+    vec2(-0.241888,  0.997065),
+    vec2(-0.094184, -0.929389),
+    vec2(-0.019101,  0.680997),
+    vec2( 0.143832, -0.141008),
+    vec2( 0.199841,  0.786414),
 
-const vec2 poissonDisk[8] = vec2[](
+    vec2( 0.344959,  0.293878),
+    vec2( 0.443233, -0.475115),
+    vec2( 0.537430, -0.473734),
+    vec2( 0.589349,  0.569135),
+    vec2( 0.674281, -0.178897),
+    vec2( 0.791975,  0.190902),
+    vec2( 0.815442,  0.879125),
+    vec2( 0.896420, -0.613392),
+    vec2( 0.945586, -0.768907),
+    vec2( 0.974844,  0.756484),
+    vec2(-0.814100,  0.914376),
+    vec2(-0.382775,  0.276768),
+    vec2(-0.915886,  0.457714),
+    vec2( 0.537800,  0.912200),
+    vec2(-0.620000, -0.650000),
+    vec2( 0.120000, -0.780000)
+);
+
+const vec2 poissonDisk16[16] = vec2[](
+    vec2(-0.94201624, -0.39906216), vec2(0.94558609, -0.76890725),
+    vec2(-0.09418410, -0.92938870), vec2(0.34495938, 0.29387760),
+    vec2(-0.91588581, 0.45771432), vec2(-0.81544232, -0.87912464),
+    vec2(-0.38277543, 0.27676845), vec2(0.97484398, 0.75648379),
+    vec2(0.44323325, -0.97511554), vec2(0.53742981, -0.47373420),
+    vec2(-0.26496911, -0.41893023), vec2(0.79197514, 0.19090188),
+    vec2(-0.24188840, 0.99706507), vec2(-0.81409955, 0.91437590),
+    vec2(0.19984126, 0.78641367), vec2(0.14383161, -0.14100790)
+);
+const vec2 poissonDisk8[8] = vec2[](
     vec2( 0.1440,  0.7659), vec2(-0.5761,  0.4479),
     vec2(-0.3220, -0.6058), vec2( 0.5693, -0.4048),
     vec2(-0.1276,  0.1657), vec2(-0.0649, -0.0165),
     vec2( 0.2773, -0.0305), vec2(-0.1134, -0.2122)
 );
-
+uniform int samples;
 float random(vec3 seed) {
     return fract(sin(dot(seed, vec3(12.9898,78.233,45.5432))) * 43758.5453);
 }
 
+float FindBlocker(vec2 uv,
+                  float zReceiver,
+                  vec2 texelSize,
+                  float bias,
+                  float lightSizeUV)
+{
+    float avgDepth = 0.0;
+    int blockers = 0;
+
+    float searchRadius = lightSizeUV * 0.5;
+
+    for(int i = 0; i < samples; i++)
+    {    
+        vec2 offset;
+        if (samples == 32) {
+            offset =
+            poissonDisk32[i]
+            * searchRadius
+            * texelSize;
+        } else if (samples == 16) {
+            offset =
+            poissonDisk16[i]
+            * searchRadius
+            * texelSize;
+        } else if (samples == 8) {
+            offset =
+            poissonDisk8[i]
+            * searchRadius
+            * texelSize;
+        } else {
+            offset =
+            poissonDisk32[i]
+            * searchRadius
+            * texelSize;
+        }
+        float depth =
+            texture(shadowMap, uv + offset).r;
+
+        if(depth < zReceiver - bias)
+        {
+            avgDepth += depth;
+            blockers++;
+        }
+    }
+
+    if(blockers == 0)
+        return -1.0;
+
+    return avgDepth / blockers;
+}
+
 float ShadowCalculation(vec4 fragPosLightSpace, vec3 norm, vec3 lightDir)
 {
 
@@ -40,10 +143,12 @@ float ShadowCalculation(vec4 fragPosLightSpace, vec3 norm, vec3 lightDir)
     float currentDepth = projCoords.z;
     vec2 texelSize = 1.0 / vec2(textureSize(shadowMap, 0));
     float shadow = 0.0;
+
     float bias =
-    max(
+    clamp(
+        0.001 * (1.0 - dot(norm, lightDir)),
         0.0003,
-        0.001 * (1.0 - dot(norm, lightDir))
+        0.003
     );
 
     if (shadowMode == 0) {
@@ -51,13 +156,20 @@ float ShadowCalculation(vec4 fragPosLightSpace, vec3 norm, vec3 lightDir)
         float angle = random(seed) * 6.2831853;; // 2*PI
         float s = sin(angle), c = cos(angle);
         mat2 rot = mat2(c, -s, s, c);
-
-        float radius = 0.7;
-
+        //float radius = 0.7;
+        float radius = mix(1.0, 4.0, currentDepth);
         
-        const int samples = 8;
         for (int i = 0; i < samples; ++i) {
-            vec2 offset = rot * poissonDisk[i] * radius * texelSize;
+            vec2 offset;
+            if (samples == 32) {
+                offset = rot * poissonDisk32[i] * radius * texelSize;
+            } else if (samples == 16) {
+                offset = rot * poissonDisk16[i] * radius * texelSize;
+            } else if (samples == 8) {
+                offset = rot * poissonDisk8[i] * radius * texelSize;
+            } else {
+               offset = rot * poissonDisk32[i] * radius * texelSize;
+            }
             float pcfDepth = texture(shadowMap, projCoords.xy + offset).r;
             shadow += (currentDepth - bias > pcfDepth ? 1.0 : 0.0);
         }
@@ -80,6 +192,59 @@ float ShadowCalculation(vec4 fragPosLightSpace, vec3 norm, vec3 lightDir)
         currentDepth - bias > pcfDepth
             ? 1.0
             : 0.0;
+    } else if (shadowMode == 3) {
+        float avgBlockerDepth =
+            FindBlocker(
+                projCoords.xy,
+                currentDepth,
+                texelSize,
+                bias,
+                lightSizeUV
+            );
+
+        if(avgBlockerDepth < 0.0)
+        {
+            return 0.0;
+        }
+
+        vec3 seed = vert_pos * 37.0 + sin(vert_pos * 91.7) * 13.0;
+        float angle = random(seed) * 6.2831853;; // 2*PI
+        float s = sin(angle), c = cos(angle);
+        mat2 rot = mat2(c, -s, s, c);
+        /*
+        float penumbraRatio = (currentDepth - avgBlockerDepth);
+        float radius = clamp(
+            penumbraRatio * lightSizeUV,
+            minRadius,
+            maxRadius
+        );
+        */
+        float radius =
+            mix(
+                minRadius,
+                maxRadius,
+                smoothstep(
+                    0.0,
+                    0.05,
+                    currentDepth - avgBlockerDepth
+                )
+            );
+        for (int i = 0; i < samples; ++i) {
+            vec2 offset;
+            if (samples == 32) {
+                offset = rot * poissonDisk32[i] * radius * texelSize;
+            } else if (samples == 16) {
+                offset = rot * poissonDisk16[i] * radius * texelSize;
+            } else if (samples == 8) {
+                offset = rot * poissonDisk8[i] * radius * texelSize;
+            } else {
+               offset = rot * poissonDisk32[i] * radius * texelSize;
+            }
+            float pcfDepth = texture(shadowMap, projCoords.xy + offset).r;
+            shadow += (currentDepth - bias > pcfDepth ? 1.0 : 0.0);
+        }
+        shadow /= float(samples);
+
     } else {
         float pcfDepth =
         texture(shadowMap, projCoords.xy).r;
@@ -109,17 +274,56 @@ void main(void) {
 
     vec3 lightDir = normalize(-sunlightDir);
     
-    vec3 ambient = ambientStrength * sunlightColor;
-    
     vec3 norm = normalize(normal);
+
+    vec3 V =
+        normalize(cameraPos - vert_pos);
+
+    vec3 H = 
+        normalize(lightDir + V);
+
+    vec3 ambient = ambientStrength * ambientColor;
     
     float diff = max(dot(norm, lightDir), 0.0);
     
     vec3 diffuse = diff * sunlightColor;
+    
+    float r =
+        clamp(roughness, 0.0, 1.0);
+
+    float shininess =
+        mix(
+            512.0,
+            4.0,
+            r
+        );
+    float ks =
+        mix(
+            0.8,
+            0.02,
+            r
+        );
+
+    float spec = 0.0;
+
+    if(diff > 0.0)
+    {
+        spec =
+            ks *
+            pow(
+                max(dot(norm,H),0.0),
+                shininess
+            );
+    }
+
+
+
+    
+    vec3 specular = spec * sunlightColor * specularStrength;
 
     float shadow = ShadowCalculation(FragPosLightSpace, norm, lightDir);  
   
-    color = vec4((ambient + (1.0 - shadow) * (diffuse)) * objectColor.rgb, objectColor.a);
+    color = vec4((ambient + (1.0 - shadow) * (diffuse)) * objectColor.rgb + (1.0-shadow) * specular, objectColor.a);
 
     //color = varyingColor;
 }

assets/shaders/block_v_shader.glsl

@@ -4,11 +4,14 @@ layout (location = 0) in vec3 pos;
 layout (location = 1) in vec2 texCoord;
 layout (location = 2) in float layer;
 layout (location = 3) in vec3 aNormal;
+layout (location = 4) in float Roughness;
+
 out vec2 tc;
 out vec3 normal;
 out vec3 vert_pos;
 flat out int tex_layer;
 out vec4 FragPosLightSpace;
+out float roughness;
 
 mat4 buildRotateX(float rad);
 mat4 buildRotateY(float rad);
@@ -28,7 +31,7 @@ void main(void) {
     tc = texCoord;
     
     tex_layer = int(layer);
-    
+    roughness = Roughness;
     normal = mat3(norm_matrix) * aNormal;
     FragPosLightSpace = lightSpaceMatrix * vec4(pos, 1.0);
     gl_Position = proj_matrix * viewPos;

include/Cubed/dev_panel.hpp

@@ -47,6 +47,7 @@ private:
     int m_pre_set_day_tick = 0;
     int m_pre_set_tick_speed = 1;
     bool m_tick_frezze = false;
+    int m_samples_idx = 1;
     void show_about_table_bar();
     void show_biome_table_bar();
     void show_time_table_bar();

include/Cubed/gameplay/block.hpp

@@ -51,13 +51,14 @@ struct BlockData {
     bool is_discard = false;
     bool is_blend = false;
     bool is_transitional = false;
+    float roughness = 1.0f;
     BlockData(BlockType b_id, std::string_view b_name, bool liquid,
               bool passable, bool cross_plane, bool transparent, bool gas,
-              bool discard, bool blend, bool transitional)
+              bool discard, bool blend, bool transitional, float r)
         : name(b_name), id(b_id), is_liquid(liquid), is_gas(gas),
           is_passable(passable), is_cross_plane(cross_plane),
           is_transparent(transparent), is_discard(discard), is_blend(blend),
-          is_transitional(transitional) {}
+          is_transitional(transitional), roughness(r) {}
 };
 
 class BlockManager {
@@ -79,6 +80,7 @@ public:
     static bool is_discard(BlockType id);
     static bool is_blend(BlockType id);
     static bool is_transitional(BlockType id);
+    static float roughness(BlockType id);
     static BlockType cross_plane_index(BlockType id);
 
 private:

include/Cubed/primitive_data.hpp

@@ -224,6 +224,7 @@ struct Vertex3D {
     float s = 0.0f, t = 0.0f;
     float layer = 0.0f;
     float nx = 0.0f, ny = 0.0f, nz = 0.0f;
+    float roughness = 1.0f;
 };
 
 struct Vertex2D {

include/Cubed/renderer.hpp

@@ -34,12 +34,23 @@ public:
     bool& shader_on();
     int& shadow_mode();
     int& light_cull_face();
+    int& light_size_uv();
+    float& min_radius();
+    float& max_radius();
+    int& samples();
+    float& specular_strength();
 
 private:
-    static constexpr glm::vec3 SUNLIGHT_COLOR{1.0f, 1.0f, 1.0f};
     static constexpr glm::vec3 SUN_COLOR{1.00f, 0.95f, 0.80f};
     static constexpr glm::vec3 MOON_COLOR{0.75f, 0.80f, 1.00f};
     static constexpr glm::vec3 SKY_COLOR{0.529, 0.808, 0.922};
+
+    static constexpr glm::vec3 SUNSET_SUNLIGHT_COLOR{1.00f, 0.45f, 0.15f};
+    static constexpr glm::vec3 NOON_SUNLIGHT_COLOR{1.00f, 0.90f, 0.65f};
+    static constexpr glm::vec3 SUNSET_AMBIENT_COLOR{0.18f, 0.12f, 0.35f};
+    static constexpr glm::vec3 NOON_AMBIENT_COLOR{0.35f, 0.50f, 0.85f};
+    static constexpr glm::vec3 MOONLIGHT_COLOR{0.55f, 0.70f, 1.00f};
+    static constexpr glm::vec3 NIGHT_AMBIENT_COLOR{0.08f, 0.10f, 0.18f};
     static constexpr float FAR_PLANE = 1000.0f;
     static constexpr float NEAR_PLANE = 0.1f;
     static constexpr float SUN_SIZE = 50.0f;
@@ -94,11 +105,21 @@ private:
     glm::mat4 m_ui_m_matrix;
     std::unordered_map<std::size_t, Shader> m_shaders;
 
-    glm::vec3 m_blend_from_sundir;
-    glm::vec3 m_blend_to_sundir;
+    glm::vec3 m_blend_from_lightdir;
+    glm::vec3 m_blend_to_lightdir;
     float m_blend_t = 1.0f;
     bool m_blend_initialized = false;
     static constexpr float BLEND_DURATION = 0.15f;
+    int m_light_size_uv = 20;
+
+    float m_min_radius = 2.0f;
+    float m_max_radius = 20.0f;
+    int m_samples = 16;
+
+    float m_specular_strength = 0.5f;
+
+    float moon_intensity = 0.3f;
+    float sun_intensity = 1.00f;
 
     /*
     0 - quad vao
@@ -124,8 +145,8 @@ private:
 
     glm::vec3 quantize_sun_direction(const glm::vec3& sundir,
                                      float angle_step_deg) const;
-    glm::vec3 get_smoothed_shadow_sundir(const glm::vec3& raw_shadow_sundir,
-                                         float dt);
+    glm::vec3 get_smoothed_shadow_lightdir(const glm::vec3& raw_shadow_sundir,
+                                           float dt);
 };
 
 } // namespace Cubed

src/block.cpp

@@ -111,6 +111,15 @@ bool BlockManager::is_transitional(BlockType id) {
     }
     return m_datas[id].is_transitional;
 }
+
+float BlockManager::roughness(BlockType id) {
+    if (id >= sums()) {
+        Logger::error("Id {}, is Over The Max Id", id, sums() - 1);
+        return m_datas[0].roughness;
+    }
+    return m_datas[id].roughness;
+}
+
 void BlockManager::init() {
     fs::path data_path{block_data_dir};
 
@@ -149,9 +158,11 @@ void BlockManager::init() {
         auto is_discard = safe_get_value(block, "is_discard", false);
         auto is_blend = safe_get_value(block, "is_blend", false);
         auto is_transitional = safe_get_value(block, "is_transitional", false);
+        auto roughness = safe_get_value(block, "roughness", 1.0);
         m_datas.emplace_back(*id, *name, *is_liquid, *is_passable,
                              *is_cross_plane, *is_transparent, *is_gas,
-                             *is_discard, *is_blend, *is_transitional);
+                             *is_discard, *is_blend, *is_transitional,
+                             static_cast<float>(*roughness));
     }
     std::sort(
         m_datas.begin(), m_datas.end(),

src/dev_panel.cpp

@@ -611,21 +611,43 @@ void DevPanel::show_items_tab_item() {
 
 void DevPanel::show_shader_tab_item() {
 
-    static const char* shader_mode[] = {"Rotated Poisson Disk PCF",
-                                        "3x3 Square Grid PCF", "PCF off"};
+    static const char* shader_mode[] = {
+        "Rotated Poisson Disk PCF", "3x3 Square Grid PCF", "PCF off", "PCSS"};
     static const char* cull_face_mode[] = {"Front", "Back"};
+    static const char* samples[] = {"8", "16", "32"};
     if (ImGui::BeginTabItem("shader")) {
         ImGui::Checkbox("Shader", &m_app.renderer().shader_on());
         if (ImGui::SliderFloat("AmbientStrength",
                                &m_app.renderer().ambient_strength(), 0.0f,
                                0.35f))
             ;
+        ImGui::SliderFloat("SpecularStrength",
+                           &m_app.renderer().specular_strength(), 0.0f, 2.0f);
         ImGui::Checkbox("Discard Transparent",
                         &m_app.renderer().discard_transparent());
         ImGui::Combo("ShaderMode", &m_app.renderer().shadow_mode(), shader_mode,
                      IM_ARRAYSIZE(shader_mode));
         ImGui::Combo("LightCullFaceMode", &m_app.renderer().light_cull_face(),
                      cull_face_mode, IM_ARRAYSIZE(cull_face_mode));
+        if (ImGui::Combo("samples", &m_samples_idx, samples,
+                         IM_ARRAYSIZE(samples))) {
+            if (m_samples_idx == 0) {
+                m_app.renderer().samples() = 8;
+            } else if (m_samples_idx == 1) {
+                m_app.renderer().samples() = 16;
+            } else if (m_samples_idx == 2) {
+                m_app.renderer().samples() = 32;
+            } else {
+                Logger::warn("Samples Index {} is invaild", m_samples_idx);
+                m_app.renderer().samples() = 16;
+            }
+        }
+        ImGui::SliderInt("LightSizeUV", &m_app.renderer().light_size_uv(), 0,
+                         800);
+        ImGui::SliderFloat("MinRaduis", &m_app.renderer().min_radius(), 0.0f,
+                           20.0f);
+        ImGui::SliderFloat("MaxRadius", &m_app.renderer().max_radius(), 0.0f,
+                           100.0f);
         ImGui::EndTabItem();
     }
 }

src/gameplay/chunk.cpp

@@ -377,7 +377,8 @@ void Chunk::gen_vertices(const OptionalBlockVectorArray& neighbor_block) {
 
                             NORMALS[face][i][0],
                             NORMALS[face][i][1],
-                            NORMALS[face][i][2]
+                            NORMALS[face][i][2],
+                            BlockManager::roughness(cur_id)
 
                         };
                         if (BlockManager::is_transparent(cur_id)) {
@@ -427,7 +428,8 @@ void Chunk::gen_cross_plane_vertices(int world_x, int world_y, int world_z,
                 static_cast<float>(BlockManager::cross_plane_index(id)),
                 CROSS_NORMALS[face][i][0],
                 CROSS_NORMALS[face][i][1],
-                CROSS_NORMALS[face][i][2]
+                CROSS_NORMALS[face][i][2],
+                BlockManager::roughness(id)
 
             };
             m_vertex_data[1].m_vertices.emplace_back(vex);

src/gameplay/vertex_data.cpp

@@ -51,10 +51,13 @@ void VertexData::upload() {
                           (void*)offsetof(Vertex3D, layer));
     glVertexAttribPointer(3, 3, GL_FLOAT, GL_FALSE, sizeof(Vertex3D),
                           (void*)offsetof(Vertex3D, nx));
+    glVertexAttribPointer(4, 1, GL_FLOAT, GL_FALSE, sizeof(Vertex3D),
+                          (void*)offsetof(Vertex3D, roughness));
     glEnableVertexAttribArray(0);
     glEnableVertexAttribArray(1);
     glEnableVertexAttribArray(2);
     glEnableVertexAttribArray(3);
+    glEnableVertexAttribArray(4);
 
     glBindVertexArray(0);
     glBindBuffer(GL_ARRAY_BUFFER, 0);

src/renderer.cpp

@@ -499,12 +499,16 @@ void Renderer::updata_framebuffer(int width, int height) {
     m_width = width;
     m_height = height;
 }
-
+#pragma region render_world
 void Renderer::render_world() {
     // shader map
     glm::mat4 light_space_matrix;
     auto& m_render_snapshots = m_world.render_snapshots();
     auto& camera_pos = m_camera.get_camera_pos();
+    float texels_per_unit = 0.0f;
+    glm::vec3 sundir = glm::normalize(m_world.sunlight_dir());
+    float sun_height = (-sundir).y;
+    glm::vec3 lightdir = sundir;
     if (m_shader_on) {
         const auto& depth_shader = get_shader("depth_shader");
         depth_shader.use();
@@ -515,16 +519,16 @@ void Renderer::render_world() {
 
         glm::vec3 center = cam_pos + cam_fwd * (half_extent * 0.5f);
 
-        glm::vec3 sundir = glm::normalize(m_world.sunlight_dir());
-        glm::vec3 raw_shadow_sundir =
-            quantize_sun_direction(sundir, ANGLE_STEP_DEG);
-        glm::vec3 shadow_sundir =
-            get_smoothed_shadow_sundir(raw_shadow_sundir, m_delta_time);
-        glm::vec3 up = fabs(shadow_sundir.y) > 0.99f ? glm::vec3(0, 0, 1)
-                                                     : glm::vec3(0, 1, 0);
+        glm::vec3 raw_shadow_lightdir =
+            quantize_sun_direction(lightdir, ANGLE_STEP_DEG);
+        glm::vec3 shadow_lightdir =
+            get_smoothed_shadow_lightdir(raw_shadow_lightdir, m_delta_time);
+        glm::vec3 up = fabs(shadow_lightdir.y) > 0.99f ? glm::vec3(0, 0, 1)
+                                                       : glm::vec3(0, 1, 0);
 
-        glm::mat4 light_basis = glm::lookAt(glm::vec3(0.0f), shadow_sundir, up);
-        float texels_per_unit = DEPTH_MAP_SIZE / (half_extent * 2.0f);
+        glm::mat4 light_basis =
+            glm::lookAt(glm::vec3(0.0f), shadow_lightdir, up);
+        texels_per_unit = DEPTH_MAP_SIZE / (half_extent * 2.0f);
         glm::vec3 ls_center = glm::vec3(light_basis * glm::vec4(center, 1.0f));
         ls_center.x =
             std::round(ls_center.x * texels_per_unit) / texels_per_unit;
@@ -536,7 +540,7 @@ void Renderer::render_world() {
         float distance = half_extent * 1.5f;
         float near_plane = 1.0f;
         float far_plane = distance + half_extent * 2.0f;
-        glm::vec3 light_pos = snapped_center - shadow_sundir * distance;
+        glm::vec3 light_pos = snapped_center - shadow_lightdir * distance;
         glm::mat4 light_view = glm::lookAt(light_pos, snapped_center, up);
         glm::mat4 light_projection =
             glm::ortho(-half_extent, half_extent, -half_extent, half_extent,
@@ -617,8 +621,24 @@ void Renderer::render_world() {
     m_v_mat = m_camera.get_camera_lookat();
     m_mv_mat = m_v_mat * m_m_mat;
     m_norm_mat = glm::transpose(glm::inverse(m_mv_mat));
-    glm::vec3 light_dir_view =
-        glm::normalize(glm::mat3(m_v_mat) * m_world.sunlight_dir());
+    glm::vec3 light_dir_view = glm::normalize(glm::mat3(m_v_mat) * lightdir);
+    float daylight = glm::smoothstep(0.05f, 0.2f, sun_height);
+
+    glm::vec3 sun_color =
+        mix(SUNSET_SUNLIGHT_COLOR, NOON_SUNLIGHT_COLOR, daylight);
+
+    glm::vec3 ambient_color =
+        mix(SUNSET_AMBIENT_COLOR, NOON_AMBIENT_COLOR, daylight);
+
+    float day_factor = glm::smoothstep(-0.15f, 0.05f, sun_height);
+    float light_intensity =
+        glm::smoothstep(moon_intensity, sun_intensity, day_factor);
+    glm::vec3 directional_light_color =
+        glm::mix(MOON_COLOR, sun_color, day_factor) * light_intensity;
+    glm::vec3 finnal_ambient_color =
+        glm::mix(NIGHT_AMBIENT_COLOR, ambient_color, day_factor);
+
+    m_ambient_strength = glm::mix(0.45f, 0.25f, day_factor);
 
     glUniformMatrix4fv(m_mv_loc, 1, GL_FALSE, glm::value_ptr(m_mv_mat));
     glUniformMatrix4fv(m_proj_loc, 1, GL_FALSE, glm::value_ptr(m_p_mat));
@@ -628,11 +648,23 @@ void Renderer::render_world() {
                        glm::value_ptr(light_space_matrix));
     glUniform1f(normal_block_shader.loc("ambientStrength"), m_ambient_strength);
     glUniform3fv(normal_block_shader.loc("sunlightColor"), 1,
-                 glm::value_ptr(SUNLIGHT_COLOR));
+                 glm::value_ptr(directional_light_color));
+    glUniform3fv(normal_block_shader.loc("ambientColor"), 1,
+                 glm::value_ptr(finnal_ambient_color));
     glUniform3fv(normal_block_shader.loc("sunlightDir"), 1,
                  glm::value_ptr(light_dir_view));
     glUniform1i(normal_block_shader.loc("shadowMode"), m_shadow_mode);
     glUniform1i(normal_block_shader.loc("shader_on"), m_shader_on);
+    glUniform1f(normal_block_shader.loc("texelsPerUnit"), texels_per_unit);
+    glUniform1f(normal_block_shader.loc("lightSizeUV"),
+                static_cast<GLfloat>(m_light_size_uv));
+    glUniform1f(normal_block_shader.loc("minRadius"), m_min_radius);
+    glUniform1f(normal_block_shader.loc("maxRadius"), m_max_radius);
+    glUniform1i(normal_block_shader.loc("samples"), m_samples);
+    glUniform1f(normal_block_shader.loc("specularStrength"),
+                m_specular_strength);
+    glUniform3fv(normal_block_shader.loc("cameraPos"), 1,
+                 glm::value_ptr(m_camera.get_camera_pos()));
     m_mvp_mat = m_p_mat * m_mv_mat;
 
     auto& m_planes = m_world.planes();
@@ -755,17 +787,17 @@ void Renderer::render_world() {
     DebugCollector::get().report(
         "rendered_chunk", "Rendered Chunk: " + std::to_string(rendered_sum));
 }
-
+#pragma endregion
 void Renderer::render_dev_panel() {
     glDisable(GL_DEPTH_TEST);
     m_dev_panel.render();
     glEnable(GL_DEPTH_TEST);
 }
 
-glm::vec3 Renderer::quantize_sun_direction(const glm::vec3& sundir,
+glm::vec3 Renderer::quantize_sun_direction(const glm::vec3& lightdir,
                                            float angle_step_deg) const {
-    float elevation = std::asin(glm::clamp(sundir.y, -1.0f, 1.0f));
-    float azimuth = std::atan2(sundir.z, sundir.x);
+    float elevation = std::asin(glm::clamp(lightdir.y, -1.0f, 1.0f));
+    float azimuth = std::atan2(lightdir.z, lightdir.x);
 
     float step = glm::radians(angle_step_deg);
 
@@ -783,30 +815,30 @@ glm::vec3 Renderer::quantize_sun_direction(const glm::vec3& sundir,
 }
 
 glm::vec3
-Renderer::get_smoothed_shadow_sundir(const glm::vec3& raw_shadow_sundir,
-                                     float dt) {
+Renderer::get_smoothed_shadow_lightdir(const glm::vec3& raw_shadow_lightdir,
+                                       float dt) {
     if (!m_blend_initialized) {
 
-        m_blend_from_sundir = raw_shadow_sundir;
-        m_blend_to_sundir = raw_shadow_sundir;
+        m_blend_from_lightdir = raw_shadow_lightdir;
+        m_blend_to_lightdir = raw_shadow_lightdir;
         m_blend_t = 1.0f;
         m_blend_initialized = true;
-        return raw_shadow_sundir;
+        return raw_shadow_lightdir;
     }
 
-    if (raw_shadow_sundir != m_blend_to_sundir) {
+    if (raw_shadow_lightdir != m_blend_to_lightdir) {
         glm::vec3 current_displayed = glm::normalize(
-            Math::slerp(m_blend_from_sundir, m_blend_to_sundir, m_blend_t));
+            Math::slerp(m_blend_from_lightdir, m_blend_to_lightdir, m_blend_t));
 
-        m_blend_from_sundir = current_displayed;
-        m_blend_to_sundir = raw_shadow_sundir;
+        m_blend_from_lightdir = current_displayed;
+        m_blend_to_lightdir = raw_shadow_lightdir;
         m_blend_t = 0.0f;
     }
 
     m_blend_t = glm::min(m_blend_t + dt / BLEND_DURATION, 1.0f);
 
     return glm::normalize(
-        Math::slerp(m_blend_from_sundir, m_blend_to_sundir, m_blend_t));
+        Math::slerp(m_blend_from_lightdir, m_blend_to_lightdir, m_blend_t));
 }
 
 float& Renderer::ambient_strength() { return m_ambient_strength; }
@@ -814,4 +846,9 @@ bool& Renderer::discard_transparent() { return m_discard_tranparent; }
 bool& Renderer::shader_on() { return m_shader_on; }
 int& Renderer::shadow_mode() { return m_shadow_mode; }
 int& Renderer::light_cull_face() { return m_light_cull_face; }
+int& Renderer::light_size_uv() { return m_light_size_uv; }
+float& Renderer::min_radius() { return m_min_radius; }
+float& Renderer::max_radius() { return m_max_radius; }
+int& Renderer::samples() { return m_samples; }
+float& Renderer::specular_strength() { return m_specular_strength; }
 } // namespace Cubed