Can xdm display a high res background image?

[William Jensen <jensenb@charter.net>]

After much experimentation with xdm config files I was able to have it come up in -32 bit mode which I guess also told it to hit 1600x1200 since that's the only mode I allowed. :)  That was good, but frankly the moires that show up with that nasty grey background are more than can be bared!  I found where they are calling the colors (I think) in /etc/X11/xdm/Xresources:

#ifdef COLOR
xlogin*greetColor: CadetBlue
xlogin*failColor: red
*Foreground: black
*Background: #fffff0
#else
xlogin*Foreground: black
xlogin*Background: white <--- bingo!
#endif

Is there a way I can tell xdm to use a nicely rendered .jpg, .png, etc?

Bill