So here's a little question that's been bouncing around in my head: we know that vehicles don't gain cover from barricades, but what kinds of custom terrain DO they get cover from?

In the latest game I played, my opponent and I assumed any stone building terrain (including ruins) would give heavy cover while some patches of forest we set up would give light. Anything that hit more around barricade-height was considered not cover for them.

How have you all handled hashing out what vehicles can and cannot use for cover?

Before a game go through all terrain and decide together what it does to what unit. That's basically the rules. There is a large list of possible terrains in the RRG but you'll still need to go through the terrain on the tabel and decide what it is and tbh we never even looked closely at the table.

After some games with the same people on the same terrain you're settled on what is what and there is no need to discuss it anymore.

On tournaments usually the TO decides what is what.

4 hours ago, Cruzer said:

we know that vehicles don't gain cover from barricades

They actually changed this in the most recent RRG! It now says that vehicles "typically" don't gain cover from barricades.

The standard for providing cover is 50% coverage of the model. Before the game we always discuss each terrain piece and determine which units are able to gain cover. If it's at least half height then the vehicle would get cover, and the type of cover would depend on the material (walls and buildings would be heavy, vegetation and other soft things would be light).

Given the above change, Droidekas, Imperial tanks, and landspeeders all get cover from barricades since they cover at least half of the height of the model.