Hello BJT_DAVE,
Thank you for posting your question. The number of vertices is a function of the tessellation value. I am not entirely sure, but it is possible the the exporter uses a default high tessellation value to ensure high quality. Unfortunately, when you export KeyShot files, it is not possible to control this value. To answer your question, the tesellation for certain formats is set at export (from KeyShot or your CAD application). However, some of our importers do offer a tesellation multiplier (tessellation slider) at import for certain CAD files: .sldprt, .sldasm, STEP, to name a few. KeyShot will work its magic, translate 3D data, and split faces into triangles at import.