First some sketches that I went over with with a charcoal pencil.
Then I laid the drawings on the blocks and tried to rub the images onto them, this kinda worked. Then I outlined them in more detail again on the blocks.
Here's the Alien egg carved out.
Here's the facehugger and my work space.
Egg and Facehugger blocks.
Alien warrior block.
All three.
The prints on the wall at the art show
