fix: skybox is not visible behind translucent blocks

res/shaders/lib/world_vertex_header.glsl

@@ -0,0 +1,17 @@
+#ifndef GLSL_WORLD_VERTEX_HEADER_
+#define GLSL_WORLD_VERTEX_HEADER_
+
+out float a_distance;
+out float a_fog;
+out vec2 a_texCoord;
+out vec3 a_dir;
+out vec3 a_normal;
+out vec3 a_position;
+out vec3 a_realnormal;
+out vec3 a_skyLight;
+out vec4 a_modelpos;
+out float a_emission;
+
+#include <world_uniforms>
+
+#endif // GLSL_WORLD_VERTEX_HEADER_