From 2b4c484dcb1031f9f196805def71887b92ab097f Mon Sep 17 00:00:00 2001
From: whitequark <whitequark@whitequark.org>
Date: Sat, 28 Jul 2018 12:33:32 +0000
Subject: [PATCH] Discard fragments with zero texture alpha in imesh_tex.frag.

This makes image requests that have an image with a hole in it
actually transparent, since otherwise the depth test would prevent
any geometry behind the request from being drawn.
---
 res/shaders/imesh_tex.frag | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/res/shaders/imesh_tex.frag b/res/shaders/imesh_tex.frag
index 79adcec..a6514f0 100644
--- a/res/shaders/imesh_tex.frag
+++ b/res/shaders/imesh_tex.frag
@@ -9,5 +9,7 @@ uniform sampler2D texture;
 varying vec2 fragTex;
 
 void main() {
-    gl_FragColor = texture2D(texture, fragTex) * color;
+    vec4 texColor = texture2D(texture, fragTex);
+    if(texColor.a == 0.0) discard;
+    gl_FragColor = texColor * color;
 }