Transparent LXTerminal on LXDE

I've been trying to set transparent terminal background in lxterminal on Arch Linux but with no luck. Setting transparent background in preferences does nothing, so does setting transparent to 1 in lxterminal.conf. I remember it being transparent in Lubuntu 16 but I can't manage to get it on Arch. I know that it was probably fake transparency, but it's sufficient for me.