This 3d model was originaly created with blender 2.49b.I had no good image references back then,as well my 3d modeling skills was not that good either.Anyway I was posting my 3d renderings made with Yafaray which was great realistic plugin for blender3d and people love it even it is not like original z4.Mine rdesign looks more like classic car redesign of z4 from year 2011.

I hope so you will like it