Here's what I got this far



I'm going to tweak the shadows a bit more before I'm done

Thanks Polygon, that was a great example! I've adapted it a bit and I'm making great progress on my work.

Thanks a lot

Welcome aboard! Thanks! :) The boolean operations in inkscape are not precise in inkscape, they add a small error to each nodes position. Reading through my post again I noticed that I didn't mention anywhere that I used the boolean operations. But, of course I did. Impressive of you to pick up on ...

I've created this shape: http://i.imgur.com/mOb02XR.png I want the "wall" thickness to be exactly one fifth of the width of the entire square. So I created the square to be 400px wide. I then placed another square inside this red square that was 240px wide. This should make the walls 80px ...