Large terrain rendering is hotspot in Computer Graphics

especially the spherical terrain rendering

which is more complicated in shape and data organization. Based on researching in spherical terrain rendering method

we propose a new spherical terrain rendering method using Geometry Clipmap. First construct an icosahedron model

and then split the icosahedron into ten main diamonds

and use spherical Sphere Quad Trees（ SQT） model to ensure G eometry Clipmap can be used in every diamond

what else

grids around the main diamond are partitioned and c omposed to a bigger virtual diamond terrain in 3 × 3 size

which enlarge clipmaps’ extent and solve the boundary crossing problem to a extent

and the Geometry Clipmap can be used in the big diamond. The result illustrates feasibility and effectivity of the method.