PNGs are a graphic format halfway between GIFs and JPGs. They are lossless like GIFs and bitmaps, but they do not have the licensing problems that GIFs do. They do not compress as well as JPGs, but then they don't mangle an image either. Most graphical utilities support the PNG format, heck even MS Paint (under WinXP) supports it.
In Metasequoia LE you can create materials and from there you can go in and click on individual polygons and assign them the current material. Imagine having a palette of materials and painting an object like a coloring book. Materials can have the usual properties (RGB/HSV, alpha, diffuse, emmision*, specular/power, & ambient) as well as texture/alpha/bump mapping*. You can also select/edit the projected UVs down to the individual polygon level if need be.
BTW, I use Meta LE since it's a freebie and trying to register the newer versions is difficult due to language/currency barriers.
--
TAZ
Metasequoia:
http://www21.ocn.ne.jp/~mizno/main_e.html
* While Metasequoia can support this, DBP's ability to read and use some of these features is still lacking.
History did not begin with PONG. -- Greg Costikyan
Game Beavers