Thanks mate !
I did this speedpainting today during lunch, 1 hour of work. Took the previous desert picture to begin with a '' textured'' background, played with brush and textures until i saw something interesting and began adding highlights in overlay, then i retouched and adjusted the contrast at the ebd. I dont like to use blending modes or auto levels too much, i feel i should be able to work without them if i improve my coloring and light knowledge.
Oh hum, i didnt use the attachement manager for this one, i was a bit over the size and i couldnt resize it from home, i hope the bandwith wont fuck up.