You're gonna laugh at this question, but is it possible to disable inter-vehicle/vehicle-terrain/vehicle-object collision on coltris the same as you can with nodes? The reason for this is that I've been thinking about ways to make the Pembroke more satisfying to destroy. But since the vehicle in question uses pressure groups, breaking it open causes instabilities that tend toward crashing the game. By adding in non-colliding pressure groups that are independent of the ship's physical structure, it would allow the ship to be fractured without exploding, and possibly to sink, should the links between the pressure groups and the ship proper be broken. Is this a current or planned feature?
Have you tried setting "collision":false as an attribute for triangles? Not sure if it's actually implemented, but if it is, that's where I'd start
Thanks, though I've discovered a new philosophy: "when in doubt, try stuff out." It turns out that if all of the nodes surrounding or composing a triangle or quad are set to be collisionless, the coltri or quad will be, too. But it still retains the ability to contact water and sense changes in density. Thanks.