Portal Cube

I made this in about 3 hours total(2 hour experimenting and making the cube itself, and 1 hour making the blue lines, including frequent interruptions):

Please comment.

Looks a bit plain to me. Maybe with a more zoomed in image, a decent bump/normal map with a texture, some ambient occlusion, and finally a different background colour this could look pretty cool. There’s a decent tutorial on texturing somewhere, but I can’t remember where it is.