select the eraser tool and then select the eraser size with the blurred outline as shown in archangels picture, this is a soft brush

Yea, Now i get, thx guys

For example, I made this image render myself with the soft eraser, something resists me because there are always little things to polish with this tool, it is not perfect, far from it. It is tedious to take renderings of images hehe, I have to get used to it.

By the way I still do not know the difference between draft funds and normal draft, maybe I'm asking too much wondering too many things, I'm really sorry. It's the only way to learn something decent. And the more the better why not

rendering with soft erase tool is illegal for one

I like to browse through these forums as I am researching this field myself as I have taken a interest, I actually did not know that myself, granted I haven't published anything I wouldn't use for my own personal use. Thanks for the heads up there.