@strawberry-3.141 I found it, I just didn’t want to post any spoilers.

Never mind, I found the answer. If anyone is searching for this in the future, in /boot/config.txt, set

hdmi_force_hotplug=1
hdmi_group=2
hdmi_mode=82

More info: https://www.raspberrypi.org/forums/viewtopic.php?f=91&t=19600

Is there a way to change the size/resolution of the VNC window (using x11vnc)? Currently it looks like this on my laptop.

It looks correct on the monitor I have for it, it would just be nice not having to lug the monitor around while I’m working on development.