Early concepts by Mike Worrall.
Giger’s unused designs for Alien³.
The Facehugger sculpture.
Sculpting the Queen facehugger.
The Queen facehugger.
The original ox burster.
The Bambi burster sculpture underway.
The Bambi burster.
On set.
The failed whippet test.
Painting the adolescent Alien stage.
Early maquettes.
Sculpting the tongue.
Sculpting the head.
Gino Acevedo’s Alien painting guide.
Storyboards.
Painting the unused leg extensions.
Alien heads.
One of the stunt heads.
Painting the suit.
Suiting up.
Testing the suit.
Ciak!
Covering the suit in the lead mixture.
The lead-covered Alien puppet.
Chris Cunningham sculpts the Alien rod puppet maquette.
One of the maquettes.
Filming the rod puppet.
Fincher and the puppet.
Weaver on set with the puppet.
The rod puppet in a scene.
The lead-covered version of the rod puppet.
The Queenburster sculpture.
The Queenburster embryo model in construction. Notice the translucency, as well as the layered structure — with a complete nervous system and a beating heart.
The CAT-scan reveal.
The Queen bursts.
The end of all things.
Main articles:
Monster Legacy 
Fantastic gallery for a fantastic monster.