vbo + fbo

I want to contribute the comunity with this code:
https://mega.co.nz/#!URkj2QTa!O6pz7hoZ5q2dG7u_QE4w2LQUmAQm_tbWKdlA9C68EI8
that shows a cube with two textures one with opacity and one with no opacity
and 4 fbos executing “rendering to texture”:
2 sides show two objects rendering in vbo mode with transparency,
and 2 sides the same thing but with no transparency.

Hope you guys appreciate