True CSS3-only convex polygons

1. Use overflow: hidden on almost all blocks.
2. Use visibility: hidden on all blocks except the last one.
3. Use a lot of transform: rotate(…) to create intersections that would hide parts of your blocks.
4. Get convex polygons, that have true clickable/hoverable areas that you can use for masking images/content and create different nice shapes.

Enjoy! And don't forget to create more shapes by yourself and make pull requests ;)