fix: skybox is not visible behind translucent blocks

res/shaders/translucent.glslf

@@ -0,0 +1,38 @@
+layout (location = 0) out vec4 f_color;
+
+#include <world_fragment_header>
+
+in vec4 a_torchLight;
+
+uniform sampler2D u_texture0;
+uniform vec3 u_sunDir;
+
+// flags
+uniform bool u_alphaClip;
+uniform bool u_debugLights;
+uniform bool u_debugNormals;
+
+#include <shadows>
+
+void main() {
+    vec4 texColor = texture(u_texture0, a_texCoord);
+    float alpha = texColor.a;
+    if (u_alphaClip) {
+        if (alpha < 0.2f)
+            discard;
+        alpha = 1.0;
+    } else {
+        if (alpha < 0.002f)
+            discard;
+    }
+    if (u_debugLights)
+        texColor.rgb = u_debugNormals ? (a_normal * 0.5 + 0.5) : vec3(1.0);
+
+    f_color = texColor;
+    f_color.rgb *= min(vec3(1.0), a_torchLight.rgb + a_skyLight
+        * calc_shadow(a_modelpos, a_realnormal, length(a_position)));
+
+    vec3 fogColor = texture(u_skybox, a_dir).rgb;
+    f_color = mix(f_color, vec4(fogColor, 1.0), a_fog);
+    f_color.a = alpha;
+}