I just ran into this same problem. For some reason, if you scale a PNG in RW, it loses it’s transparency. If you open the file in Photoshop, and scale it (reduce the pixel dimensions) then put into RW at 100%, transparency now works.
I just ran into this same problem. For some reason, if you scale a PNG in RW, it loses it’s transparency. If you open the file in Photoshop, and scale it (reduce the pixel dimensions) then put into RW at 100%, transparency now works.