EPISCURA is a great site I discovered today with lots of high quality texture resources. They even have free HDRI panoramas for you indirect lighting needs! It’s all free but you have to make an account. The daily download limit is a paltry 15mb though, which barely covers one HDRI panorama. You can pay to upgrade to a higher limit but it’s not required. Oh and don’t forget to check out their blog. If has a lot of interesting and inspirational articles!