Mach5 makes nice virts.
However, and Mach and I have discussed this, I don't like how Mach draws the branches. He draws them with the underneath bud extending the branch. That "sometimes" happens, but usually it's the upper bud that extends the branch. The branch growing from the upper bud shades out the lower branch.
What's the difference?
Branches extending as top buds dominating grow out as a series of "hills". Branches grown out using bottom buds extend as a series of "valleys". Which is the way Mach drew it.
However, go out and look at deciduous trees now, while they're bare of leaves. You'll see that they grow out predominately as "hills". Occasionally, there will be a "valley". But mostly hills.
Here's a little drawing I made to illustrate the concept:
View attachment 131406
The top is "hills", the bottom is "valleys". Which looks more natural?