Thanks to Pink_Iguanas I could "seamlessly" make my own portal themed bookshelf. Take a look! The 3d mesh has been fixed (I had problems with Pink_Iguanas' model not being a closed manifold in Slic3r) and now it works on Slic3r and Cura. It consists of 3 objects: the character Chell, a frame (the bracket structure that mounts on your bookshelf) and a wavy portal. The stitching between the portal and the frame is far from optimal and it has some bugs noticeable on the print prior to painting. After painting, though, it seemed to blend much better.

I plan on making the other header side, where the character is going into an orange portal. The 3d file is already released, when I have it printed I'll post some pictures!

Have fun!!

https://youtu.be/h86goYBQ1EI