Help please

[ushults]

How can i get cloud like this, whitout any photoshop trick?

Pict.com - road.jpg

 

[dxqcanada]

Polarizing filter.

 

[AlexColeman]

Polarizing filter, and a little PP. Possibly a Grad ND if the sky was brighter.

 

[EOS_JD]

Polarizing filter, and a little PP. Possibly a Grad ND if the sky was brighter.

+1

I should add that the clouds do need to be there..... Every day is different.