Produce a sci-fi shooter tileset

Hi !
i need to produce nice tiles gfx for my shooter. where can i found some tutorials about this (pixel art, old school sci-fi tiles ala Xenon) ?
Thanks for your links.

Observe sci-fi movies, like Alien(s/3/Res.), AVP, Star Wars, Star Trek, Blade Runner, etc. Tons of concepts to be seen there. Additionally you might hunt some H.R.Giger artwork. Not all his stuff is alien bones, he also did some sci-fi enviroments (iirc he's made some title like New York City, which is quite sci-fi'ish and vast)

If you have no artistic talent try World Creator
The freeware 1.5 can probably do the job but scroll through the gallery to see what else can be done.
Some good examples of retro style Sci-fi tiles.

thanks. Note that i can't lauch the freeware 1.5 version of World Creator. With the zip file or the other link. Is someone else have also the same pb ?

This person?

no it's not me.

Not exactly a tutorial, but a free tile set:

http://lostgarden.com/2005/03/game-post-mortem-hard-vacuum.html

Hey Mustang, nice find! Thanks for sharing that.