Below is a link that will be helpful to you. The app is free, never expires, but if you want to get rid of the watermark on the pics you have to pay for the program.

I really good program that is utterly free is The Gimp. You'll also want to download the file Grokking The Gimp, which explains how to use this program. It takes some patience to learn how to use, but it's the best free program available. This is a cool program because it is constantly being developed by many people in different countries. Here's the link:

I hope this works for you! Be sure to get the tutorial; it explains the way pics are composed – very interesting.

ansel adams, richard avedon, irving penn

Do you mean you added coloured powder?

Any chemical added to water will affect the evaporation rate slightly, and so the different chemicals to give different colours will make a bit of difference.

The other thing will be how much energy different colours absorb – for example, black is good at abosorbing heat, whereas white tends to reflect heat. So the darker colours will have abosorbed more energy, heating the water quicker and causing more evaporation.

I already have Photoshop CS3 extended so naturally I would use it for this (and have). I don't know if there are programs specifically designed for HDR but I would imagine so… and they most likely are less expensive than Adobe.

I'm impressed with the quality of control Adobe provides.

It is probably used to prep your canvas before you paint on it.