Originally posted by kobayashi
I usually use Adobe Photoshop.
Like Prometeus, the first thing I do is remove the background. Use any contrasting colour to draw a outline around the object you want and then colour away the rest of the background.
Then adjust the brightness,contrast and shift the colour spectrum as required to get the best image.
Save as the big picture in JPEG format.
Resize to fit Civ 2.
Adjust the brightness and contrast again. At this point I usually choose the 'sharpen' comand as a final touch.
Then cut and copy over to the unit.bmp in MS paint.
In MS Paint, look for unwanted border colours. I use the colour of the unwanted border pixels repeatedly to fill the background (which eats up the unwanted border pixels) until all are gone.
Finally fill in the background with the standard pink and proceed with manual touchup.