Game breaking glitch on ps4. Game crashes without warning when fast traveling to my (rather large) settlement at starlight drive in. Only began happening at level 55, with 5 days 12 hours of play time. It even crashes when I walk to starlight drive in and it begins to render the settlement as I come in range of seeing the settlement structures. I have a feeling it could be an item I built that is causing the game to crash when it is rendered? Before this occurred I was building up my settlement there for an hour or so. I saved in full view of my 5 best sets of power armor, one of each type. I cannot tell at which point in the rendering of the settlement the game crashes. My companion I just picked up is Danse. There are 20 people at the settlement, ~50 food and water, 80 power, 105 defense, size almost maxed out.

The reason it is crashing is because you have far too many polygons/items in one spot. Maybe you were scrapping guns too that allows you to build larger settlement. My advice is to to fast travel to a closer point of interest. Walk to starlight then face away when you are really close. Walk backwards until you reach the enclosed area where you can build. Activate it, then start scrapping away the materials (or save to workshop) that you built. Make sure you autosave frequently.

I'm having a similar issue but at Sanctuary. I built a large wooden pre fab house, windmill generator and added a trader then invited some settlers from Starlight Drive-In bringing my total Sanctuary settlers to 12. I saved my game and shut my PS4 down for the night, the next day I tried loading my save in Sanctuary and the game kept crashing repeatedly. I finally got the save to load without it crashing and my game was all stuttering in Sanctuary until it finally crashed. At first I thought that my save was just borked but now I'm wondering if it's a memory issue when building settlements or a rendering issue as you mentioned. I have since reverted to an old save with only the minimal requirements built in Sanctuary and the game hasn't crashed for about 10 hours of playtime. I like the settlement building but I may just have to put it on hold until Beth can fix it.

I had a quicksave just outside the settlement that used to load. But for some reason, it will not load either now, so I cannot load my game except for my most recent save which is 10 gameplay hours earlier (a terrible practice I know...). I guess from now on I'll be taking up the rest of my console's memory with 20MB save files... Also, I have definitely been scrapping guns (that lets me make my settlement bigger? I was wondering what was doing that...) but that was the only way to keep adding all the stuff I wanted in my settlement and it was really helping me with some materials shortages (screws). I just assumed I could build my base until the meter got to the top and didn't think about hardware limitations.