From 85b97d19d302e55c2f767f5c45bb34527206a328 Mon Sep 17 00:00:00 2001
From: AnyOldName3 <krizdjali+github@gmail.com>
Date: Wed, 17 Oct 2018 14:02:26 +0100
Subject: [PATCH] Add alpha threshold for shadow casting.

---
 files/shaders/shadowcasting_fragment.glsl | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/files/shaders/shadowcasting_fragment.glsl b/files/shaders/shadowcasting_fragment.glsl
index 6459467b1..00b8f9aa1 100644
--- a/files/shaders/shadowcasting_fragment.glsl
+++ b/files/shaders/shadowcasting_fragment.glsl
@@ -14,4 +14,8 @@ void main()
         gl_FragData[0].a = texture2D(diffuseMap, diffuseMapUV).a * alphaPassthrough;
     else
         gl_FragData[0].a = alphaPassthrough;
+
+    // Prevent translucent things casting shadow (including the player using an invisibility effect)
+    if (gl_FragData[0].a < 0.5)
+        discard;
 }