If this has something to do with OpenGL, a properly built asymptote might solve the problem.
I'm using on windows the cygwin binary provided by the Asymptote developers: http://asymptote.sourceforge.net/ The binary is included in TeX Live 2017 for windows. context ntg71.tex works fine. Akira ___________________________________________________________________________________ If your question is of interest to others as well, please add an entry to the Wiki! maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context webpage : http://www.pragma-ade.nl / http://context.aanhet.net archive : https://bitbucket.org/phg/context-mirror/commits/ wiki : http://contextgarden.net ___________________________________________________________________________________