I really like drawing sulphur in Inkscape. :) I came up with an easy way to do it. Basically you use the star/polygon tool in polygon mode. Set it to make 6- or 7-sided polygons, spoke ratio should be at about .8, rounding should be at 0, crank random up to .17. Then draw a shape to your liking – this will be one sulphur crystal, Sketch out paths to break the base path of your crystal into rectangular pieces. Then cut the path with those lines. Use varying shades of yellow with small very bright yellow highlights to make it look like a crystal. Once you have a few crystals, duplicate them like crazy and use the grid arrange and the align tool to randomize how they are compositioned.
Maybe if I have time one of these days I’ll do a tutorial. :) It’s fun!
(p.s. I spent some time tonight gathering together an archive on the wiki of web promo banners that have been created for Fedora. If you’ve got one I forgot please add it :) )