Making a thick line in Partiview Suppose you want to create a line, or several lines, between (x0,y0,z0) and (x0,y0,z1) that is of color c (index to a cmap file) and width w. Create a file blah.txt with lines of the form x0 y0 z0 x1 y1 z1 w c Copy the file makethicklines.pl, and say perl makethicklines.pl blah.txt blah.speck In the cf file, create a separate group for this object g1=blah include blah.speck eval alpha 1 eval slum 1 eval lum const 10