This is part of one of the .mat files I use with thier palm trees pack.
specular=0.25
cullface=0
shader="abstract::mesh_diffuse_bumpmap_sway.vert", "abstract::mesh_diffuse_bumpmap_specular_alphatest.frag"
shadowshader="abstract::mesh_shadow_sway.vert","abstract::mesh_shadow.frag"