<div>Lattice Diamond: How do i set multiple verilog include directories on my design?</div><div><br></div>
You can add multiple directories in the "Verilog Include Search Path" in Design implementation, you can define them as (Example):
C:/Users/cmeala/Desktop/CASES/Include Case/Path1;C:/Users/cmeala/Desktop/CASES/Include Case/Path2
then try using `include "filename.v" in your input files.