yeah this guy just makes the images greyscale first and then convert them to RGB, the final outcome is still RGB. I mean it does makes sense to make the images greyscale to get a better control of the values. I just misunderstood you a little bit when you said "so basically,its better to greyscale the image before making the map?"
Yes making them greyscale first does make a lot of sense, seeing as it is easier to control the values that way.
Last edited by Ezeth; May 23, 2016 at 03:12 AM.