Transparent object isn't showing the intersecting object inside it The cylinder has raytrace transparency on and it does show the texture of the globe through it but not the squares. How come the grid doesn't show through the cylinder?
I am guessing that rendering wireframes inside other materials or through effects like refraction is not supported since the wireframe is itself sort of a "2D-like effect.

Try using a Wireframe modifier in your cubes instead, that should be visible inside refractive materials, at the expense of extra geometry.