It is to be hoped that the examples in this and other sections inspire you to doing great things with photos and other pictures. Many photographs etc. can be transformed in a way which is rather spectacular. See, for example, the ease with which you can change the hue even of transparent plastic. However, Rubber Dub-Dub is incapable of miracles. The fact is that you cannot make a silk purse out of a sow's ear. Dark or dingy photos can sometimes be improved, but sometimes it is better not to even try too much. What is important is that you learn little by little what RD-D is capable of and what it is not. There is also more than one way to skin a cat, so the fact that I have used one particular method for transforming a picture does not imply necessarily that you must use the same method.
I would be deeply honoured to be allowed to see examples of your most satisfactory creations using RD-D. Please do send me some of your pictures by e-mail attachment and a report of the method or tools you found most useful.