From 489febd903d99ba846062f21d387e1c2f1016b27 Mon Sep 17 00:00:00 2001
From: Marijn van Vliet <w.m.vanvliet@gmail.com>
Date: Tue, 11 Feb 2020 17:16:02 +0000
Subject: [PATCH] Fix

---
 surfer/viz.py | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/surfer/viz.py b/surfer/viz.py
index f600d69..2b46ff1 100644
--- a/surfer/viz.py
+++ b/surfer/viz.py
@@ -3322,6 +3322,11 @@ def add_data(self, array, fmin, fmid, fmax, thresh, lut, colormap, alpha,
                 **kwargs)
             surf.actor.property.backface_culling = False
 
+            # There is a bug on some graphics cards concerning transparant
+            # overlays that is fixed by setting force_opaque.
+            if float(alpha) == 1:
+                surf.actor.actor.force_opaque = True
+
         # apply look up table if given
         if lut is not None:
             l_m = surf.module_manager.scalar_lut_manager