Maybe this might show more steps... https://www.youtube.com/watch?v=RYa8khHlbhY You have to block out the large shapes first. Try to make it modular. For the edges it depends. This I would do last once you have the main pieces that you are going to break up. Once you have your modular parts bring into your sculpting…
For broken brick edges, you can model a section of broken wall and make it modular, then add individual bricks to break up the silhouette. For example, look at the roof tiles here https://polycount.com/discussion/91066/pirate-castle-udk/p1
Do you mean like this? I place bricks by hand for the top sections only? https://www.exp-points.com/modular-building-destroyed-inside-ue4How do you make the jagged edges on the wall and do you bake all of this in substance painter? Great, that has truly clarified what I need to do next. Thank you so much.