Hi Phil - the switch from DirectX to OpenGL would take some work but that part is not really all that bad.

It's much more the UI and some of the application infrastructure stuff which is based on Windows libraries and will be very time consuming to reimplement in a platform neutral way.

My guess is that it would take me about 1 year's worth of work focusing on just that task alone to do a full port. It is hard to come up with that amount of time, right now I have prioritized adding in one year's worth of new features instead.

- Michael