Recent graphics hardware has introduced a number useful techniques that can be applied to terrain rendering. In this report, we describe some of the issues with terrain rendering, such as performance. We describe our framework for implementing terrain rendering algorithms which help to reduce implementation complexity. We explore the possibility of applying recent hardware and API features to the Geometry Clipmaps algorithm proposed in 2004. Our implementation is described, which makes use of the nested grid structure introduced in Geometry Clipmaps, as well as recent hardware tessellation features in modern GPUs. Some experiments are carried out to evaluate the new approach. Compared to the original algorithm from 2004, our implementation improves performances by 71%.