there are two images like this:

they are the same graphic in the different size (the large one with some empty area
then I try this:
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function main()
local bg\_img = display.newImage("bg.png")
local bg\_cloud1\_img=display.newImage("res\_bg\_cloud1.png")
local bg\_cloud2\_img=display.newImage("res\_bg\_cloud2.png")
bg\_cloud2\_img.y=300
end
main()
--------------------------------------------------------
the result is:

the res_bg_cloud2.png (the smaller image) was appeared like double size ?
you can download the test file here: Download [import]uid: 5376 topic_id: 695 reply_id: 300695[/import]