Howeverevaluating spatial queries across a large set of actors / scene meshes would require testing each mesh instance one-by-one. To speed this up,BuildSpatialEvaluationCache()can be called to build an Octree across mesh instances.FSpatialCacheInfois a separate representation of each unique (actor, chlidmesh, spatial, boundingbox) tuple, a list of these is built and then inserted into an Octree.