Okay, here are some suggestions in regards to perspective:

This vanishing point example is still a little too high, and the matte perspective needs to be completely changed (hence I can understand why Ady is building a miniature set to account for this).

Here is a crude example:

Even this is off, as the vanishing point perspective still needs to be even lower (the "3 rebels" camera is roughly between waste and shoulder level, whereas the unaltered matte camera is somewhere around 10 to 15 feet off the floor)... regardless, you get the idea.