Q:

How to use wildcard * with graphicspath in LaTeX?

How can you have the wildcard character, for example in the following code?
\graphicspath{{1/*/pictures/}}

A:

You can't use wildcards with \graphicspath.  You'll have to be explicit:
\graphicspath{{1/pictures/}{2/pictures/}{3/pictures/}{...etc...}}

I found the LaTeX Wikibook a few months ago.  It's a good reference for getting started.

