From b44063f50020e5e1a6d45b6cf33cc1007a918c66 Mon Sep 17 00:00:00 2001
From: Zeno Rogue <zeno@attnam.com>
Date: Tue, 23 Oct 2018 20:12:38 +0200
Subject: [PATCH] darken_color correctly darkens hyperboloid instead of
 disabling it

---
 polygons.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/polygons.cpp b/polygons.cpp
index ac513847..9ed165ea 100644
--- a/polygons.cpp
+++ b/polygons.cpp
@@ -1215,7 +1215,7 @@ int qp[PMAX], qp0[PMAX];
 
 void darken_color(color_t& color) {
   int alpha = color & 255;
-  if(vid.alpha <= 1) {
+  if(sphere && pmodel == mdDisk && vid.alpha <= 1) {
     color = 0;
     }
   else if(alpha == 255)