need tips on how to make a large terrain run more quickly and not lag when scrolling in and out.

Question

Mark Shamoun · Answer

Try turning off Contour graphics - this is the big performance killer for Terrain display. Without them performance is very good for massive terrains.

Shawn Cooke · Answer

Typically, POD files are very taxing. If this is a raw LAS data source, my recommendation is to change the density of the POD down as low as 10 (or to what seems reasonable), clip the POD down to smaller reasonable areas if needed, create terrain from smaller POD and export your POD produced Terrain out to DTM, TIN or LandXML then import that file (Terrain import) back in for any future terrain editing and/or use by OpenRoads technology.