Polymer - help thread

[Puritan]

So I made a fresh folder.
Added: Duke3D.GRP , latest EDuke32 snapshot, Autoload folder with the latest duke3d_hrp.zip.
On startscreen ticked: Polymer, Enable Autoload folder.
But there's no polymer lights emitted?
Do I need to edit some .cfg or .def files maybe?
(Tried the "R_PR_lighting" command in the console too...)

Got a brand new rig with an:
AMD FX-8350 Black Edition Socket-AM3+, 4.0GHz, 8-Core, 8MB L2 + 8MB L3 Cache CPU
XFX Radeon R9 280X 3GB GDDR5 BLACK PCI-Express 3.0, "DD-Edition", GHOST 2.0, DL-DVI-I + SL-DVI-D, HDMI, 2xmini-DP GPU
16Gb's RAM

[Forge]

you might have to use the eduke32.exe -forcegl parameter because of your video card

[Puritan]

Weird 
I found a fix.

I've opened "Settings.cfg" and added the command: r_pr_lighting = "1"
Now the dynamic lights works smooth as guacamole.
But when I re-open the settings.cfg file my added command has disappeared??

No big deal since the Polymer lights now are working but I find it strange anyway.