It depends; Instanced meshes in fact are only really usefull when the bottleneck is on the CPU side of things. The majority of Fps drop you see in editor is mainly due to the processing of selecting too many actors and the action of applying the outlining shader to them. Just keep in mind that Instanced Meshes aren’t a miraculous solution to everything; it drops CPU overhead, but the GPU gets all the heavy work and it may even make your game lose performance on the Gpu side depending of what you’re doing.