function povray(povfile,varargin)
Width=-1;
Height=-1;
Inifile='';
Outfile='';
Options ='';
ProcessVarargin(varargin);
POVpath='c:\program files\pov-ray for windows v3.6';
POVpath='c:\progra~1\pov-ra~1.6'; %DOS version without spaces
%s=sprintf('!"%s\\bin\\pvengine.exe" +I%s',POVpath,povfile);
s=sprintf('!"%s\\bin\\megapov.exe" +I%s',POVpath,povfile);
if Width>0
  s=sprintf('%s +W%d',s,Width);
end
if Height>0
  s=sprintf('%s +H%d',s,Height);
end
if ~isempty(Outfile)
  s=sprintf('%s +o%s',s,Outfile);
end
if ~isempty(Options)
  s=sprintf('%s %s',s,Options);
end
s=sprintf('%s +L%s',s,fullfile(POVpath,'include'));
if ~isempty(Inifile)
  s=sprintf('%s %s',s,fullfile(POVpath,'renderer',Inifile));
end
eval(s);