Hi, this may be more texture related than Level editing/Modelling but it seems the most adequate section to post.
I recently wrote a tutorial on making normalmaps/displacement maps using a greyscale drawing. If you haven't already guessed, this is based on Kat's tutorial. As this is my first tutorial, comments/crits would be greatly appreciated.
3D texture mapping for Hard Surfaces
The English falls a little bit rough during the tutorial, I do hope to revise it further sometime soon.
Thanks,
~Thorn