on Tortuga if u go in to wild woodlands then go to the caves I got a black screen. game also crashes frequently. and when u meet jack at Tortuga when he is done talking it put me underneath the map
Try going into caves through other entrances. Where are you trying to go? For less crashing, try the settings I posted here. And finally, the underneath spawn is a known issue, you can just switch oceans to get back on tortuga or port back.
