re: "... this L3P was antique ..."
For what it's worth, I spent some time testing the AIOI version of L3P and it works with POV in my case if I do all of the following:
1) Remove spaces from all paths, filenames, and internal model names, and
2) Put the LDraw file in a directory with proper permissions, and
3) Point LPub3D to a simple utility app to parse the L3P command options, remove -lgeo, and then call L3P
For what it's worth, I spent some time testing the AIOI version of L3P and it works with POV in my case if I do all of the following:
1) Remove spaces from all paths, filenames, and internal model names, and
2) Put the LDraw file in a directory with proper permissions, and
3) Point LPub3D to a simple utility app to parse the L3P command options, remove -lgeo, and then call L3P