A wireframe geodesic sphere with small holes at the vertices made with TopMod. I designed this to transfer a geodesic design onto a ball as shown in my profile photo. After receiving the printed model I cut it into 2 hemispheres and put the ball inside. I connected the halves together using small sections of wire insulation of just the right diameter. I then inflated the ball to fill the model and marked the vertices through the small holes using a fine pen.