I pointed LPub3D to a program that grabbed the command options, altered them, and then started L3P with the altered options. It looks like I may need to do something similar with the POV process. Here's a sample showing the -lgeo option which I suspect is what requires the old lg_colors and lg_materials files:
-ca0.01
-cg0.0,0.0,3116890
-ld
-lgeo
-lgdC:\LDraw\LGEO
-car0.772727
-o
-lddC:\path01\LDraw
-q4 -sw2
C:\path02\tmp\csi.ldr
C:\path02\tmp\csi.ldr.pov
[Edit]
The commands I captured were identical to the commands as reported in the header of the L3P output file.
-ca0.01
-cg0.0,0.0,3116890
-ld
-lgeo
-lgdC:\LDraw\LGEO
-car0.772727
-o
-lddC:\path01\LDraw
-q4 -sw2
C:\path02\tmp\csi.ldr
C:\path02\tmp\csi.ldr.pov
[Edit]
The commands I captured were identical to the commands as reported in the header of the L3P output file.