Shadows are off.I'd honestly just turn shadows off on them
I've seen it done without a rad file before. Might have been CSGO though.I think you have to specify -proptextureshadows for the fence models somewhere in your own lights.rad file. At least, you used to. It might be fixed by now. Or Valve just broke it again
I'll add a source to this post if I have time
Sure you spelled -textureshadows correctly in the compile parameters? Could be as simple as that.