From 3055621894618f764a3e760bf9b906e86c7987dc Mon Sep 17 00:00:00 2001
From: MihailRis <mexaruc@gmail.com>
Date: Mon, 2 Feb 2026 18:35:44 +0300
Subject: [PATCH] improve sky lighting

---
 res/shaders/entity.glslv       | 4 +++-
 res/shaders/lib/constants.glsl | 4 ++--
 res/shaders/lib/sky.glsl       | 5 +++--
 res/shaders/main.glslv         | 4 +++-
 res/shaders/translucent.glslv  | 4 +++-
 5 files changed, 14 insertions(+), 7 deletions(-)

diff --git a/res/shaders/entity.glslv b/res/shaders/entity.glslv
index c337ddb2d..d50cd0075 100644
--- a/res/shaders/entity.glslv
+++ b/res/shaders/entity.glslv
@@ -13,6 +13,8 @@ layout (location = 4) in vec4 v_normal;
 
 out vec4 a_color;
 
+uniform float u_dayTime;
+
 void main() {
     a_modelpos = u_model * vec4(v_position, 1.0);
     vec3 pos3d = a_modelpos.xyz - u_cameraPos;
@@ -26,7 +28,7 @@ void main() {
     a_texCoord = v_texCoord;
 
     a_dir = a_modelpos.xyz - u_cameraPos;
-    vec3 skyLightColor = pick_sky_color(u_skybox);
+    vec3 skyLightColor = pick_sky_color(u_skybox, u_dayTime);
     a_color.rgb = max(a_color.rgb, skyLightColor.rgb * v_light.a) * v_color;
     a_color.a = u_opacity;
 
diff --git a/res/shaders/lib/constants.glsl b/res/shaders/lib/constants.glsl
index 74f295458..1c2f4062b 100644
--- a/res/shaders/lib/constants.glsl
+++ b/res/shaders/lib/constants.glsl
@@ -8,8 +8,8 @@
 #define CURVATURE_FACTOR 0.002
 
 // lighting
-#define SKY_LIGHT_MUL 2.9
-#define SKY_LIGHT_TINT (vec3(1.0, 0.95, 0.9) * 2.0)
+#define SKY_LIGHT_MUL 2.5
+#define SKY_LIGHT_TINT (vec3(1.0, 0.75, 0.6) * 2.0)
 #define MIN_SKY_LIGHT vec3(0.2, 0.25, 0.33)
 
 // fog
diff --git a/res/shaders/lib/sky.glsl b/res/shaders/lib/sky.glsl
index ce3604f5f..97203286b 100644
--- a/res/shaders/lib/sky.glsl
+++ b/res/shaders/lib/sky.glsl
@@ -3,8 +3,9 @@
 
 #include <constants>
 
-vec3 pick_sky_color(samplerCube cubemap) {
-    vec3 skyLightColor = texture(cubemap, vec3(0.4f, 0.05f, 0.4f)).rgb;
+vec3 pick_sky_color(samplerCube cubemap, float dayTime) {
+    float elevation = sin(dayTime * PI2) * 0.2;
+    vec3 skyLightColor = texture(cubemap, vec3(0.0f, elevation, -0.4f)).rgb;
     skyLightColor *= SKY_LIGHT_TINT;
     skyLightColor = min(vec3(1.0f), skyLightColor * SKY_LIGHT_MUL);
     skyLightColor = max(MIN_SKY_LIGHT, skyLightColor);
diff --git a/res/shaders/main.glslv b/res/shaders/main.glslv
index 3d7220297..8cc7a7637 100644
--- a/res/shaders/main.glslv
+++ b/res/shaders/main.glslv
@@ -10,6 +10,8 @@ layout (location = 3) in vec4 v_normal;
 #include <fog>
 #include <sky>
 
+uniform float u_dayTime;
+
 out vec4 a_torchLight;
 
 void main() {
@@ -25,7 +27,7 @@ void main() {
     a_texCoord = v_texCoord;
 
     a_dir = a_modelpos.xyz - u_cameraPos;
-    vec3 skyLightColor = pick_sky_color(u_skybox);
+    vec3 skyLightColor = pick_sky_color(u_skybox, u_dayTime);
     a_skyLight = skyLightColor.rgb*v_light.a;
 
     mat4 viewmodel = u_view * u_model;
diff --git a/res/shaders/translucent.glslv b/res/shaders/translucent.glslv
index 8c429e97b..16cc8c4e3 100644
--- a/res/shaders/translucent.glslv
+++ b/res/shaders/translucent.glslv
@@ -12,6 +12,8 @@ layout (location = 3) in vec4 v_normal;
 
 out vec4 a_torchLight;
 
+uniform float u_dayTime;
+
 void main() {
     a_modelpos = u_model * vec4(v_position, 1.0f);
     vec3 pos3d = a_modelpos.xyz - u_cameraPos;
@@ -25,7 +27,7 @@ void main() {
     a_texCoord = v_texCoord;
 
     a_dir = a_modelpos.xyz - u_cameraPos;
-    vec3 skyLightColor = pick_sky_color(u_skybox);
+    vec3 skyLightColor = pick_sky_color(u_skybox, u_dayTime);
     a_skyLight = skyLightColor.rgb*v_light.a;
 
     mat4 viewmodel = u_view * u_model;