Transparency issues?

[James D. <ja...@ro...>]

I seem to be having trouble when I set the attribute 
kQ3AttributeTypeTransparencyColor on my billboard object. It seems that 
no matter what I set it to, other than 1.0, I get some strange 
transparency effect. In one image, the transparent part is simply the 
darkest part of the image, and with a different transparency setting, 
the transparent part is the border between a white background and the 
dark part of the image.

In yet another, the transparency doesn't change, regardless of the 
transparency colour. Does anyone have any idea what might be going on 
here? Could it be that these images have an alpha channel, and that 
that is disrupting Quesa's setting?

Thanks,
James