spherical dome projections using Unity

Hello,

We are students from Carnegie Mellon and this semester we are working on a project where we require a physical installation setup inside a high school teaching students about usage of different renewable sources of energy. One of our physical setup that we plan is to use projections on a spherical dome that probably would represent a sun or the globe or whatever, we haven't decided that yet.

For now we are just exploring different possibilities from a technical point of view. We came across different Unity Wrappers ( some free and some super expensive ) that does conversion of images inside Unity to a circular/ spherical projection (we plan to use a projector and a normal paper hemispherical dome for now ) to prototype our ideas.

So we came across two wrappers.

1. Paul Bourke's iDome -> http://paulbourke.net/dome/UnityiDome/

2. Omnity 2.0 -> http://www.elumenati.com/research/omnity-2-0-is-here/

We haven't researched much on these two technologies but Omnity 2.0 costs USD 500 and iDome is basically free to use.

If anyone with any experience using these technologies or have used one these two technologies in the past could give us a brief overview as to how good they are, how easy they are to use, which is a better one if we compare the two, does Omnity 2.0 have any special features for its cost? and stuff like that, we would highly appreciate it

Thanks again.