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Higher definitions work better, but I've done a lot of work with 72 dpi and it definitely works as an alpha plane... This is a large one, definitely... For stuff like this, probably the larger will work better... In small stuff, like individual objects, samller resoutions work fine.. for instance, if you go to the link above, you can see a picture I did in painter.. That's 72 dpi, 500X500 and it works just fine... another thing is, for skies, you don't have to use the technique outlined by varian above, you just have to bring in the picture of the sky on a regular plane, and then just vary the transparency and the ambient setting till it blends in with the scene.. The background sky should be a very light blue, and just play with that color until you get something that blends altogether... if you want to bring in individual objects, the technique outlined above by Varian works... For further pictures and illustrations go to http://www.multimania.com/arte/beginners/bitmap.html Guitta has an excellent tutorial for Vue 2