I am very excited to introduce new materials to include in your materials. Check for updates at
http: //playcanvas.com/materials and soon at https://m.youtube.com/channel/UC_aLAtFRUyG4BF2xQ2tfWVw feel free to subscribe 
Assets include “file.psd” files ready for you to edit yourself in Photoshop. The project will be constantly updated to include new materials.