From 15f3a3168a91fd39d1805834b27ff67626b5cf08 Mon Sep 17 00:00:00 2001
From: Marijn van Vliet <w.m.vanvliet@gmail.com>
Date: Fri, 5 Nov 2021 10:19:20 +0200
Subject: [PATCH] Set force_opaque when adding annotations to Brain

---
 surfer/viz.py | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/surfer/viz.py b/surfer/viz.py
index e42c491..b54781c 100644
--- a/surfer/viz.py
+++ b/surfer/viz.py
@@ -3372,6 +3372,10 @@ def add_annotation(self, annot, ids, cmap, **kwargs):
         l_m = surf.module_manager.scalar_lut_manager
         l_m.lut.table = np.round(cmap).astype(np.uint8)
 
+        # There is a bug on some graphics cards concerning overlays that is
+        # fixed by setting force_opaque.
+        surf.actor.actor.force_opaque = True
+
         # Set the brain attributes
         return dict(surface=surf, name=annot, colormap=cmap, brain=self,
                     array_id=array_id)