Here are 2 photos of the same area; one after about 5 months of growth, where you can see the cambium starting to swell up around the wound, and one from now, showing where we opened up one of the wounds a little more, and created a few new ones. The ovals serve several purposes:
1. Creating wounds that the tree responds to by callousing around; which gives us more character to work with later. Do a little at a time, rather than using power tools and the detail is more convincing...if you're not great at carving with power tools. More wood piling up around the wounds gives depth, character, and more wood to work with.
2. Redirecting the water-lines, or live veins around the wounds. If you look at the heavily carved shimps, you'll see several live veins winding up and around the deadwood. We're slowly but surely going to connect these ovals of deadwood, and we'll be left with these live veins that wind up and around the deadwood.
3. When an oval is carved, and the tree responds as described in #1 and #2 above, it creates some swelling around the wound, which we can use to make the trunk appear thicker. Carve an oval in the front, and the swelling on either side of the wound widens the trunk. Carve one on the outside of a bend, and bend becomes bigger. You can really use this to your advantage if you plan accordingly.
The second image shows an oval Kathy drew around an existing oval. She wanted to save this one for last, to see if the tree actually added wood, or if it was just the cambium swelling. In this location, the tree hadn't added wood here, so she decided to leave it alone for another year.
To Kirk's point, it is a very different, but a refreshing approach to work with Kathy because you don't leave with a finished tree, it's like going to Bonsai Class...you learn a TON, usually not in the area you expected, and you advance a tree, doing something this time for the tree to respond to, and we'll look at it's response next time.