fix: skybox is not visible behind translucent blocks

res/shaders/lib/lighting.glsl

@@ -6,6 +6,11 @@ float calc_torch_light(vec3 normal, vec3 modelpos) {
          * max(0.0, -dot(normal, normalize(modelpos - u_cameraPos)));
 }
 
+vec3 calc_torch_light(vec3 light, vec3 normal, vec3 modelpos, vec3 torchLightColor, float gamma) {
+    float torchlight = calc_torch_light(normal, modelpos);
+    return pow(light + torchlight * torchLightColor, vec3(gamma));
+}
+
 vec3 calc_screen_normal(vec3 normal) {
     return transpose(inverse(mat3(u_view * u_model))) * normal;
 }