HexTech performance issues

Hi

I all i am new to unity hextech and i am having performance issues with hextech, when hextech draws the terrain, it does so by drawing a lot of triangles to create the hex colums, this can be seen by viewing the wirefram of the hextech map scene. Because of so many draw calls, this slows down hextech to a crawl

please suggest some fix or tell me if i can give some information about this problem.

Regards Ahsan