Lorena,
Courage. It's not your art that lacks anything. You may just be looking
in the wrong market. Not sure what to suggest since I don't know the
field. I do geology stuff quite often, but it comes out of the blue
attached to another job that comes from a more commercial source. . I
don't advertise it. It happens that I'm doing some work for a geologist
who seems to respect art quite a bit. (it's 3-d modeling and animation
he wants) But in general, I think scientists themselves are not the
greatest market for art. Read poor market. They are not the people with
money. Your experience at the conference seems quite believable to me.
Think about expanding your audience. Look in some of the national source
books. There is a lot of technical art out there, done by commercial
illustrators, who may not know anything about geology, for corporate or
publishing clients. This is true for science illustration in general, in
my experience.

Paul

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Paul Mirocha Design
425 East 17th Street
Tucson, Arizona  85701
Phone/Fax: 520/623-1515
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http://www.CoArt.com/mirocha/

"Derive happiness in oneself from a good day's work,
from illuminating the fog that surrounds us."
-- Henri Matisse