By "forest", do you mean trees and such? because trees don't go well with hot environments.
Ahhhh! But maybe tree shaped diamond and graphite crystals can do a little better in hot environments. Hot and pressure is basically where diamonds come from. I recommend checking out fractals for some ideas. http://en.wikipedia.org/wiki/Fractal
This is a Julia set which is related to the famous Mandelbrot set.
The above was generated in silico ( http://en.wikipedia.org/wiki/In_silico
), but below is the result of a high voltage breakdown within a 4 inch block of acrylic.
and get a load of Brownian Trees.
Why think inside the box when the name of the activity is New