Merimask Goes On And On

For display, I really like the autumn-colored one; it's subtle, and would make a lovely contrast shown as a set with one of your Green Man masks. But for stage work, the subtlety of those colors would be lost from any sort of distance -- it's like looking at stage makeup up close, to get a reasonable effect from the seats you have to go for really dramatic, exaggerated stuff. So definitely go for the brown-and-green for theatrical use...or if you want to do something in an autumnal color scheme, try something more high-contrast like a lighter grayish bark and blazing deep red-orange leaves, or darker bark and leaves tinged with bright yellow?

They're all quite lovely.