if software rendering is to be expected, safe users from extra punishment

e.g. in basic containerized environments -
do not sleep and print message to console

Author: aumuell

src/OpenCOVER/cover/OpenCOVER.cpp

@@ -818,10 +818,18 @@ bool OpenCOVER::init()
     }
     if(VRViewer::instance()->softwareRendering)
     {
-        hud->setText2("Warning: llvmpipe detected!");
-        hud->setText3("COVER may run very slow and some shaders may not work.");
-        hud->redraw();
-        std::this_thread::sleep_for(std::chrono::seconds(5));
+        std::cerr << "****************************************************************" << std::endl;
+        std::cerr << "*** WARNING: software rendering/llvmpipe detected.           ***" << std::endl;
+        std::cerr << "*** COVER may run very slowly and some shaders may not work. ***" << std::endl;
+        std::cerr << "****************************************************************" << std::endl;
+
+        if(!coCoviseConfig::isOn("COVER.AcceptSoftwareRendering", true))
+        {
+            hud->setText2("Warning: llvmpipe detected!");
+            hud->setText3("COVER may run very slow and some shaders may not work.");
+            hud->redraw();
+            std::this_thread::sleep_for(std::chrono::seconds(5));
+        }
     }
 
     hud->setText2("initialising plugins");