Thanks Andrea for the previous png8 thread. I am still digging it up more.
Here is another problem. The png8 transparent tiles come out pretty fine as long as there is some underlying feature data but when there is no data, the tiles turn out to be opaque black tiles. Do you know what could be the reason? As soon as we add some data to such tile and request again for the wms tile, the tile comes out fine. Wherever there is no underlying postgis source, the tile turns out to be black (and opaque too).
BTW, the anti-aliasing on the png8 is pretty bad compared to png24. Is that expected or is there some setting (SLD or otherwise) by which I can control the anti-aliasing.
Thanks
Louvy Joseph