A morning walk last week inspired my newest pastel landscape

"When Spring Walks Softly" 12"x9" soft pastel over a thin gouache underpainting that I used to map out my composition and warms and cools. I don't draw first, just start painting but almost always use some variety of underpainting, usually a simple, light application of hard pastels that I then fix with rubbing alcohol. But I'm finding irregularly thick spots of gouache add a little tooth to my surface and I'm liking that. Any other thoughts on underpainting?