Chris Kennon wrote:
This is exactly what I had in mind, thanks. to clarify my understanding an 8-bit png doesn't have an alpha channel, so transparency is derived the same as gif, from a solid color. However, the 24-bit png has an alpha channel specifying transparency?
Both PNG 8 and PNG 24 have alpha transparency channels available. However, in PNG 8 it's an additional 1 bit channel (so pixels are either fully opaque, or fully transparent), while in PNG 24 it's a full 8 bit channel (allowing up to 256 levels of transparency - effectively, you now have a 32 bit image: a byte for R,G,B and A).
At least that's how I undestand it... -- Patrick H. Lauke _____________________________________________________ re�dux (adj.): brought back; returned. used postpositively [latin : re-, re- + dux, leader; see duke.] www.splintered.co.uk | www.photographia.co.uk http://redux.deviantart.com
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