From c4921dd90dbe7a5963c94d094769414214151308 Mon Sep 17 00:00:00 2001
From: Collin Smith <collinsmith70@gmail.com>
Date: Sun, 24 Jan 2021 16:51:06 -0800
Subject: [PATCH] Workaround for #139

---
 assets/shaders/indexpalette3.frag | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/assets/shaders/indexpalette3.frag b/assets/shaders/indexpalette3.frag
index 2a6b1fc5..da857319 100644
--- a/assets/shaders/indexpalette3.frag
+++ b/assets/shaders/indexpalette3.frag
@@ -23,6 +23,11 @@ void main() {
     color = texture2D(ColorMap, color.ar);
   }
 
+  // workaround for https://github.com/collinsmith/riiablo/issues/139
+  else if (color.a == 0.99609375) { // index 255 == float(255 / 256)
+    color.a = color.a - 0.00390625; // index 255 -> 254 by subtracting float(1 / 256)
+  }
+
   color = texture2D(ColorTable, color.ar);
 
   // Set alpha to tint alpha, including palette id 0