I have being using PNGNQ of late with tiles and I saw this blog post yesterday http://blog.klokan.cz/2008/11/png-palette-with-variable-alpha-small.html could this be useful for mapguide? z -- Zac Spitzer - http://zacster.blogspot.com http://ennoble.dreamhosters.com/mapguide-central/ +61 405 847 168