[Closed] bitmap… support png with alpha?

no special save setting that I know of.
i’d start by checking to make sure that bmp1 contains alpha data.
what do you get back from a print of the bitmap array?

here’s a snippet showing how to check for an alpha value in an arbitrary bitmap:

 for g = 0 to myBitmap.height by 1 do --for the height of the bitmap
 (
   local myPixelRow = getPixels myBitmap [0,g] myBitmap.width --get a row of pixels			
   for j = 1 to myPixelRow.count do --for every pixel in the row
   (
   if myPixelRow[j] != (color 0 0 0 0) then --if the pixel isn't completely transparent
 	(
 	myCoordinates = point2 (j-1) g
 	print myCoordinates  --print the pixel coordinate
 	)
   )
 )