Xash3D is the powerful independent open-sourced 3D-engine, aimed for high compatibility with GoldSource engine formats (maps, models, textures, sounds, entities etc.), but with the intention to be an advanced platform for modmaking or game development. Technically it has been built from a scratch, using as totally original ideas, as some ideas from other 3D-engines. Xash3D overcomes obsolete GoldSource engine's limits and provides for you a new quality of gaming experience and modmaking capabilities, as extended map, model, texture & sound formats with higher limits, possibility to implement custom renderers with dynamic lighting and other modern features. Xash3D is the easy-to-use base to play existing Half-Life mods & create something new, impossible with GoldSource. Years of development & testing allowed to make from Xash3D a perfect mix of high compatibility with common GoldSource standards & high openness to creative modmaking ideas.
There is a sample video demonstrating some new features of upcoming Custom Build of XashXT mod by SovietCoder (project is based on XashXT mod by Unkle Mike). You can see there two types of grass automatically "planted" by engine on the ground (ground texture, types of grass and additional parameters, such as height and density, can be specified by user). Also Custom Build will allow mapper to create glasses and water with realistic refractions (and reflections), using special normal maps for that. Moreover, there are planned support for overbrights (better lighting effects) plus bump-mapping, specular-mapping and parallax mapping. Work in progress, final release date is not determined yet.