About this document
InstaLOD can process an almost unlimited amount of polygons as long as you have the hardware to support it, so please make sure that your machine has enough RAM available when processing large files on high settings.
E.g. increasing the remesh "Resolution" will improve the quality of the reconstructed surface, but the memory that InstaLOD requires for the operation grows exponentially.
Another cause for RAM usage could be the timeline. A copy of the scene needs to be saved in the background for every timeline entry and can use up large amounts of memory when processing massive files multiple times.
For more information on how to prevent crashes and process large data sets, please refer to this article on How to process massive data sets.