[Mapserver-users] Transparency values - confusion

[Dylan Keon]

Havard Tveite wrote:
> For IMAGETYPE PNG in my build, a TRANSPARENCY value of 90
> gives me 10 % transparency, while for IMAGETYPE PNG24 and
> IMAGETYPE JPEG, a TRANSPARENCY value of 90 gives me 90%
> transparency (for me, the latter is the expected behaviour).

I've noticed the same thing in 3.7.  When I switch between 8-bit and 
24-bit output I have to invert my transparency values (i.e., change 25 
to 75 and vice-versa) to get the same effect.

--Dylan