These cloud shots were taken with a reasonably good camera, about 15 years ago. Unfortunately commercial printing of colour reversal film was (in retrospect) in those days, very poor. The images shown were scanned from prints, and edited for exposure and to appear sharper, but NOT for hue or saturation. We watched this remarkable thunderhead internally lit by lightning for about an hour. I suppose I should be glad to have seen it and have at least some poor record of its occurrence.