I use bitmaps.
Hmm...well, if you don't want the tileset quality to seriously degrade, make sure that "remap tileset" isn't checked when you compile it. Note that this will screw up the sprite colors (Jazz will be black, ect).
It can also matter with what program you are using. With Paint Shop Pro, the quality doesn't lower drastically when you go to 156 colors, but if you use MS Paint then you might as well've not made a tileset at all.
Hope that helped.
__________________
<table width="100%"><tr><td valign="top"><a href="http://www.jj2.info" title="waaaait" style="font-size: 14pt;font-family: Verdana;text-decoration: none;">penny on the train track</a>
<a href="/junk/tick/tickbot.html">readme</a> - <a href="/junk/tick/quote.html">quotes</a> - <a href="/junk/tick/rsg.html">formats</a> - are you brained? *\o/*</td><td width="1%" align="right">  </td></tr></table>
|