Can you turn a Landscape object into a Static Mesh?

I dont know if its available now or not…
I have a blueprint controlling color of it’s static mesh. I want to control landscape color to.
do you have any idea to control it? I have export .FBX file and then imported it to the map but its really slow! not running in my strong PC!
i need your help please…
actually i have a world want to change color of every thing in the map by its temperature(witch is a variable i have created for every object and its changing when the game is running) I am using blueprint for every kind of object i have (for example a blueprint for stones and replacing all the stones in outliners with the blueprint) its working fine in small environments but its really slow in my big env … any idea could be useful