Geometry triangle Free 3D model

This is a 4 sided glass pyramid with a glass sphere inside with a solid cube inside of that. Shapes within shapes. I was not too suer if I could pull of something like this. I encourage you all to download this model to take a closer look and you will find that there is exactly a cube within the sphere. I did the pyramid as a speerate model, then the sphere and the cube all in sketchup, then I imported the cube first to put that inside of the sphere, using the scaling tool, then I saved the two as one whole model and then I imported combined cube inside a sphere model, scaled it down to fit it inside the pyramid and then to adjust the sphere and cube model to the right size and line everything up as best possible, so when you zoom in, the path will take you to the sphere and into it to face the solid cube iside.