Always in the context of a Rubik's cube app in Java/Opengl with lwjgl, i want to improve my drawing (<http://manuelselva.files.wordpress.com/2010/09/cube.gif>) in order to have rounded edges for each one of the 27 small cube ? What i would like to acheive at the end is the same as the wikipedia cube picture: <http://fr.wikipedia.org/wiki/Fichier:Rubik%27s_cube.svg>

What is the easiest solution to do that ?