I love this painted technique, it's so "artsy" on a scrapbook page. First, stamp and heat emboss the trees with clear powder. Next, paint over the embossed images with acrylic paint. I used a big foam brush and left lots of dry brush strokes so the background would show through. Lastly, wipe away the paint from your embossed images. A baby wipe is perfect for this. You can wait for the paint to dry, or wipe it away when it's wet (I used the wet method with this example).
I used the same technique on the words "summer" on this layout as well. Neat stuff!