var groundMaterial = new THREE.MeshPhongMaterial( { color: 0xff43fee, specular: 0x360000 ,} );
groundMesh = new THREE.Mesh( new THREE.PlaneBufferGeometry( 2000, 2000 ), groundMaterial );
groundMesh.rotation.x = - Math.PI / 2;
scene.add( groundMesh );
I want to add grass texture down but not getting any possible solution this code is taken from https://github.com/schteppe/gpu-physics.js this following github repo.
You need to create a Texture and send it as map property in the MechPhongMaterial constructor