Hy there!

A while ago I have stumbled upon a tutorial that was teaching you how to use those "stamp" brushes realistically, so for example the clouds brushes will have shades of blue and look like a cloud, other shape brushes could have many colours and the grunge brushes can be used to create realistic details on metal textures for example.

Do you know of such a tutorial?

Thank you in advance!

Best regards!

Samp brushes? do you mean the cone stamp tool or pattern tool?
I am not sure of what brushes you are talking about.

No, I mean those brushes that are useless at drawing.The point and click brushes.Like brushes of clouds, animals,planets, and so on.

Look for tutorial on making custom brushes, there are tons out there. Just Google making custom brushes, actually its pretty simple to make your own brush.

You understood me wrong.I am not looking for the brushes or a way to build them, just for a way to use them in a realistic manner.There was a tutorial on how to use these brushes.How to combine the colors and transparencies.And there were other things in those tutorials.I know for sure one of them was about cloud brushes (not about how to create them, but how to use them creatively once you have them).That tutorial was using brushes of real clouds.That is what I call a "stamp" brush.A brush made from a photo.

And that tutorial was explaining how to use such brushes so the "stamped" clouds would look like real...

I don't know, but if you find it again, let me know. I'm interested in that, too.

Try this one.
http:/www.lunacore.com/photoshop/tutorials/tut021.htm

I know that one too, but it's not the one I am looking for.In that one the clouds were already made from photographs.I am not intersted in making clouds.I have given that tutorial as an example hoping you will know what I am looking for.I am interested in the process.If I will find the process, that will apply to all.
I will post a link to the tutorial when (if) I will find it again.Then you will understand what I mean.
Thank you!

I haven't heard of this tutorial you are talking about but here's an idea... 

Stamp the cloud on one layer a greyish color.  Duplicate this layer and change the color of it in "image/adjust/hue and saturation" for another color you'd like in your cloud. Change the property of this layer to "color" and with the eraser and a soft brush, erase little bits of that layer so that the color or the original shows through.

Or another idea... 

Stamp the cloud on one layer.  Duplicate this layer and lock its transparency.  Apply a gradient with colors you'd like on it or paint over it with the airbrush with the colors you want.  Since the transparency is locked it will only paint or apply the gradient on the cloud.  Then change the layer property to "color".  If you'd like to see the color of the original show through, unlock the transparency and erase in some places with a soft brush.

You can try changing this layer property to something else too, "overlay", "color dodge" etc...  might give some interesting results and play with the layer's opacity. 

I'm not sure if this is what you're looking for and maybe this tutorial showed a better way of going about it but it might do the trick...

I think I recall this one - if I remember right you will find yourself changing the "brush" after almost every click.

Click ONE cloud, make a seperate layer, get another cloud brush and click, rinse and repeat. This way you can duplicate the clouds you've made by duplicating the Layer it's on, resize and reposition, then move onto another layer. This was to have dense cloud cover using brushes - not a couple of puffy clouds in the sky.

Looked like it would take forever - good idea on paper, frustrating to actually DO.

Good luck-
-Lew ;-)