Strnad, D.Guid, N.2015-02-192015-02-1920041467-8659https://doi.org/10.1111/j.1467-8659.2004.00751.xIn the paper, a new method for modelling trees at medium detail is presented. The method is based on a volumetric representation of trees, generated by an iterated function system (IFS). Alleviating the modeling restrictions of fractal techniques, extensions to the standard IFS are introduced. Practical aspects of modeling and rendering of trees, such as data structures and bounding volumes, are discussed. The advantages of the new method are described at the end together with some results.10.1111/j.1467-8659.2004.00751.x173-187