Ellipsoid and torus implicit meshes generated using parametric equations in conjunction with view-dependent tessellation implemented using Hull and Domain Shaders.
Procedurally generated terrain achieved through use of Perlin Noise (generated using a random hash function).
Deferred shading including a separate forward rendering pass for Geometry Shader generated billboarded particle systems.
Implicit objects generated using signed distance functions and raymarching.
Sam Ivill 