Zhu3D for Gentoo is an interactive OpenGL-based mathematical function viewer. You can visualize explicit functions, parametric systems, and ISO surfaces. The viewer supports zooming, scaling, and rotating as well as filed lighting or surface properties. Special effects are animations, transparency, textures, fog, and motion blur. Equation systems can be solved with a fast adaptive search. Zhu3D for Gentoo provides you with up to eight background settings, lights, wire-modes, or illumination models. For picture rendering and textures all common formats are recognized. User-defined functions can have any amount of parameters, can be nested or recursive. For special purposes if-clauses and Boolean operators are supported. ISO surfaces can use different volume-based algorithms.