Performance improvement - reuse materials

[AlasdairMott]

Currently, new materials are created for every single block instance. It might be more efficient to create them once up front.

Something like...

import * as THREE from 'three';

export const materials = [
    new THREE.MeshBasicMaterial({ color: 0x00ff00 }),
    new THREE.MeshBasicMaterial({ color: 0xff0000 }),
    new THREE.MeshBasicMaterial({ color: 0x0000ff }),
]

Make sure not to dispose the materials array