>Eventually, you could detect the video mode and recommend to the user to change it.

I agree that "morally" it is improper to change a user's system setting. However, many users still don't know what's screen resolution, 256 colors or true color...
Assuming I'm able to detect that the user's video is able to display true color, am I really left just with these options:

1. create different graphics for different color settings
2. recommend to the user to change it (as per your suggestion)
3. leave it as it is & hope for the best

I really do not want to brush off the importance of visual impact.

Thanks

John Low.