ve been working on a scene for a while and recently im noticing some really low fps (5-7fps) when the lighting needs rebuilding (red warning message) , normally its up around the 45-50fps. After I`ve rebuilt the lighting its fine. Any ideas
whats going on behind the scenes that could be causing it. No matter how many objects i hide from the scene the fps is really low until I do a build.
Its only just started happening but cant figure out what could be causing this issue.
I`m using Unreal 4.7.4 btw