Ok so I have resolved this issue myself. And I’m putting this up for anyone having the same issues with textures and buildings and trees not loading at all when arriving at your destination city.
the problem for me was I. The subnetmask= enters in the p3d.cfg
I removed the whole entry and moved all other txt to the top of the page. This fixed all the issues I had. Textures now load in instantly and all the buildings and trees are in place. I’ve not done any more testing with the subnetmask entry so I’m not sure if it was the value it was set to or just the fact that I had the subnetmask entry that it didn’t like.
also I didn’t try this in p3d4.5 as I’m not using it anymore but I’m pretty sure it is the same as I got the subnetmask value from my p3d4.5.cfg file. Anyway I hope this helps anyone having issues with textures loading in.