On Jul 26, 8:07 am, Radu Ciocan <cio... / gmail.com> wrote:
> Thanks Tim for your reply.
>
> My image is not with one solid color.
> I have already an image to change the opacity.
>
> Unfortunately, I tried
> img.opacity = Magick::MaxRGB / 2
> but it doesn't working
>
> I tried also with background_color = 'none'.
>
>

What makes you think it doesn't work? How are you viewing the image?
What kind of image is it? A GIF? A JPEG?